diff --git a/packages/datetime2/src/components/date-range-input3/dateRangeInput3.tsx b/packages/datetime2/src/components/date-range-input3/dateRangeInput3.tsx
index 58bd965c29..630fc8e200 100644
--- a/packages/datetime2/src/components/date-range-input3/dateRangeInput3.tsx
+++ b/packages/datetime2/src/components/date-range-input3/dateRangeInput3.tsx
@@ -38,6 +38,7 @@ import {
     DateUtils,
     Errors,
     type NonNullDateRange,
+    TimePrecision,
 } from "@blueprintjs/datetime";
 
 import { Classes } from "../../classes";
@@ -288,6 +289,15 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
     // Callbacks - DateRangePicker3
     // ===========================
 
+    private getTimePrecision = () => {
+        // timePrecision may be set as a root prop or as a property inside timePickerProps, so we need to check both
+        const { timePickerProps, timePrecision } = this.props;
+        if(timePickerProps === DateRangePicker3.defaultProps.timePickerProps) {
+            return undefined;
+        }
+        return timePickerProps?.precision ?? timePrecision;
+    }
+
     private handleDateRangePickerChange = (selectedRange: DateRange, didSubmitWithEnter = false) => {
         // ignore mouse events in the date-range picker if the popover is animating closed.
         if (!this.state.isOpen) {
@@ -306,9 +316,11 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
 
         let boundaryToModify: Boundary | undefined;
 
+        const timePrecision = this.getTimePrecision();
+
         if (selectedStart == null) {
             // focus the start field by default or if only an end date is specified
-            if (this.props.timePrecision == null) {
+            if (timePrecision == null) {
                 isStartInputFocused = true;
                 isEndInputFocused = false;
             } else {
@@ -321,7 +333,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
             startHoverString = null;
         } else if (selectedEnd == null) {
             // focus the end field if a start date is specified
-            if (this.props.timePrecision == null) {
+            if (timePrecision == null) {
                 isStartInputFocused = false;
                 isEndInputFocused = true;
             } else {
@@ -335,7 +347,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
             isOpen = this.getIsOpenValueWhenDateChanges(selectedStart, selectedEnd);
             isStartInputFocused = false;
 
-            if (this.props.timePrecision == null && didSubmitWithEnter) {
+            if (timePrecision == null && didSubmitWithEnter) {
                 // if we submit via click or Tab, the focus will have moved already.
                 // it we submit with Enter, the focus won't have moved, and setting
                 // the flag to false won't have an effect anyway, so leave it true.
@@ -346,7 +358,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
             }
         } else if (this.state.lastFocusedField === Boundary.START) {
             // keep the start field focused
-            if (this.props.timePrecision == null) {
+            if (timePrecision == null) {
                 isStartInputFocused = true;
                 isEndInputFocused = false;
             } else {
@@ -354,7 +366,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
                 isEndInputFocused = false;
                 boundaryToModify = Boundary.START;
             }
-        } else if (this.props.timePrecision == null) {
+        } else if (timePrecision == null) {
             // keep the end field focused
             isStartInputFocused = false;
             isEndInputFocused = true;
@@ -560,6 +572,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
             isValueControlled ? values.controlledValue : values.selectedValue,
             this.props,
             this.state.locale,
+            this.getTimePrecision(),
             true,
         );
 
@@ -593,7 +606,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
             if (isValueControlled) {
                 nextState = {
                     ...nextState,
-                    [keys.inputString]: formatDateString(values.controlledValue, this.props, this.state.locale),
+                    [keys.inputString]: formatDateString(values.controlledValue, this.props, this.state.locale, this.getTimePrecision()),
                 };
             } else {
                 nextState = {
@@ -680,7 +693,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
     private getIsOpenValueWhenDateChanges = (nextSelectedStart: Date, nextSelectedEnd: Date): boolean => {
         if (this.props.closeOnSelection) {
             // trivial case when TimePicker is not shown
-            if (this.props.timePrecision == null) {
+            if (this.getTimePrecision() == null) {
                 return false;
             }
 
@@ -747,7 +760,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
         } else if (this.doesEndBoundaryOverlapStartBoundary(selectedValue, boundary)) {
             return this.props.overlappingDatesMessage;
         } else {
-            return formatDateString(selectedValue, this.props, this.state.locale);
+            return formatDateString(selectedValue, this.props, this.state.locale, this.getTimePrecision());
         }
     };
 
@@ -893,7 +906,7 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
         // N.B. this.state will be undefined in the constructor, so we need a fallback in that case
         const maybeLocale = this.state?.locale ?? typeof props.locale === "string" ? undefined : props.locale;
 
-        return formatDateString(date ?? defaultDate, this.props, maybeLocale);
+        return formatDateString(date ?? defaultDate, this.props, maybeLocale, this.getTimePrecision());
     };
 
     private parseDate = (dateString: string | undefined): Date | null => {
@@ -907,7 +920,8 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
 
         // HACKHACK: this code below is largely copied from the `useDateParser()` hook, which is the preferred
         // implementation that we can migrate to once DateRangeInput3 is a function component.
-        const { dateFnsFormat, locale: localeFromProps, parseDate, timePickerProps, timePrecision } = this.props;
+        const { dateFnsFormat, locale: localeFromProps, parseDate, timePickerProps } = this.props;
+        const timePrecision = this.getTimePrecision();
         const { locale } = this.state;
         let newDate: false | Date | null = null;
 
@@ -931,7 +945,8 @@ export class DateRangeInput3 extends DateFnsLocalizedComponent<DateRangeInput3Pr
 
         // HACKHACK: the code below is largely copied from the `useDateFormatter()` hook, which is the preferred
         // implementation that we can migrate to once DateRangeInput3 is a function component.
-        const { dateFnsFormat, formatDate, locale: localeFromProps, timePickerProps, timePrecision } = this.props;
+        const { dateFnsFormat, formatDate, locale: localeFromProps, timePickerProps } = this.props;
+        const timePrecision = this.getTimePrecision();
         const { locale } = this.state;
 
         if (formatDate !== undefined) {
@@ -950,6 +965,7 @@ function formatDateString(
     date: Date | false | null | undefined,
     props: DateRangeInput3Props,
     locale: Locale | undefined,
+    timePrecision: TimePrecision | undefined,
     ignoreRange = false,
 ) {
     const { invalidDateMessage, maxDate, minDate, outOfRangeMessage } = props as DateRangeInput3PropsWithDefaults;
@@ -961,7 +977,7 @@ function formatDateString(
     } else if (ignoreRange || DateUtils.isDayInRange(date, [minDate, maxDate])) {
         // HACKHACK: the code below is largely copied from the `useDateFormatter()` hook, which is the preferred
         // implementation that we can migrate to once DateRangeInput3 is a function component.
-        const { dateFnsFormat, formatDate, locale: localeFromProps, timePickerProps, timePrecision } = props;
+        const { dateFnsFormat, formatDate, locale: localeFromProps, timePickerProps } = props;
         if (formatDate !== undefined) {
             // user-provided date formatter
             return formatDate(date, locale?.code ?? getLocaleCodeFromProps(localeFromProps));
diff --git a/packages/datetime2/src/components/date-range-picker3/dateRangePicker3.tsx b/packages/datetime2/src/components/date-range-picker3/dateRangePicker3.tsx
index 5cd0ed9679..85715aa5de 100644
--- a/packages/datetime2/src/components/date-range-picker3/dateRangePicker3.tsx
+++ b/packages/datetime2/src/components/date-range-picker3/dateRangePicker3.tsx
@@ -208,7 +208,7 @@ export class DateRangePicker3 extends DateFnsLocalizedComponent<DateRangePicker3
         }
 
         const { selectedShortcutIndex } = this.state;
-        const { allowSingleDayRange, maxDate, minDate, timePrecision } = this.props;
+        const { allowSingleDayRange, maxDate, minDate } = this.props;
         return [
             <DatePickerShortcutMenu
                 key="shortcuts"
@@ -218,7 +218,7 @@ export class DateRangePicker3 extends DateFnsLocalizedComponent<DateRangePicker3
                     minDate,
                     selectedShortcutIndex,
                     shortcuts,
-                    timePrecision,
+                    timePrecision: this.getTimePrecision(),
                 }}
                 onShortcutClick={this.handleShortcutClick}
             />,
@@ -226,15 +226,23 @@ export class DateRangePicker3 extends DateFnsLocalizedComponent<DateRangePicker3
         ];
     }
 
-    private maybeRenderTimePickers(isShowingOneMonth: boolean) {
+    private getTimePrecision = () => {
         // timePrecision may be set as a root prop or as a property inside timePickerProps, so we need to check both
-        const { timePickerProps, timePrecision = timePickerProps?.precision } = this.props;
-        if (timePrecision == null && timePickerProps === DateRangePicker3.defaultProps.timePickerProps) {
+        const { timePickerProps, timePrecision } = this.props;
+        if(timePickerProps === DateRangePicker3.defaultProps.timePickerProps) {
+            return undefined;
+        }
+        return timePickerProps?.precision ?? timePrecision;
+    }
+
+    private maybeRenderTimePickers(isShowingOneMonth: boolean) {
+        const timePrecision = this.getTimePrecision();
+        if (timePrecision == null) {
             return null;
         }
 
         const isLongTimePicker =
-            timePickerProps?.useAmPm ||
+            this.props.timePickerProps?.useAmPm ||
             timePrecision === TimePrecision.SECOND ||
             timePrecision === TimePrecision.MILLISECOND;
 
@@ -246,13 +254,13 @@ export class DateRangePicker3 extends DateFnsLocalizedComponent<DateRangePicker3
             >
                 <TimePicker
                     precision={timePrecision}
-                    {...timePickerProps}
+                    {...this.props.timePickerProps}
                     onChange={this.handleTimeChangeLeftCalendar}
                     value={this.state.time[0]}
                 />
                 <TimePicker
                     precision={timePrecision}
-                    {...timePickerProps}
+                    {...this.props.timePickerProps}
                     onChange={this.handleTimeChangeRightCalendar}
                     value={this.state.time[1]}
                 />