diff --git a/data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/s3/S3ScanPartitionCreationSupplier.java b/data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/s3/S3ScanPartitionCreationSupplier.java
index 28685e6e2c..98f59fde95 100644
--- a/data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/s3/S3ScanPartitionCreationSupplier.java
+++ b/data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/s3/S3ScanPartitionCreationSupplier.java
@@ -183,6 +183,9 @@ private boolean isKeyMatchedBetweenTimeRange(final LocalDateTime lastModifiedTim
                                                  final LocalDateTime endDateTime,
                                                  final boolean isFirstScan) {
         if (!isFirstScan && schedulingOptions != null) {
+            if (startDateTime != null) {
+                return lastModifiedTime.isAfter(startDateTime);
+            }
             return true;
         } else if (Objects.isNull(startDateTime) && Objects.isNull(endDateTime)) {
             return true;
diff --git a/data-prepper-plugins/s3-source/src/test/java/org/opensearch/dataprepper/plugins/source/s3/S3ScanPartitionCreationSupplierTest.java b/data-prepper-plugins/s3-source/src/test/java/org/opensearch/dataprepper/plugins/source/s3/S3ScanPartitionCreationSupplierTest.java
index 2183f69d02..5214399d4b 100644
--- a/data-prepper-plugins/s3-source/src/test/java/org/opensearch/dataprepper/plugins/source/s3/S3ScanPartitionCreationSupplierTest.java
+++ b/data-prepper-plugins/s3-source/src/test/java/org/opensearch/dataprepper/plugins/source/s3/S3ScanPartitionCreationSupplierTest.java
@@ -296,7 +296,7 @@ void getNextPartition_supplier_with_scheduling_options_returns_expected_Partitio
 
 
     @Test
-    void scheduled_scan_filters_on_start_time_and_end_time_for_the_first_scan_and_does_not_filter_on_subsequent_scans() {
+    void scheduled_scan_filters_on_start_time_and_end_time_for_the_first_scan_and_filters_on_start_time_for_subsequent_scans() {
         schedulingOptions = mock(S3ScanSchedulingOptions.class);
         given(schedulingOptions.getCount()).willReturn(2);
 
@@ -308,8 +308,10 @@ void scheduled_scan_filters_on_start_time_and_end_time_for_the_first_scan_and_do
         globalStateMap.put(notFirstScanBucket, "2024-09-07T20:43:34.384822Z");
         globalStateMap.put(SCAN_COUNT, 0);
 
-        final LocalDateTime startTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(1725907846000L), ZoneId.systemDefault());
-        final LocalDateTime endTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(1725907849100L), ZoneId.systemDefault());
+        long startMillis = 1725907846000L;
+        long endMillis = 1725907849100L;
+        final LocalDateTime startTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(startMillis), ZoneId.systemDefault());
+        final LocalDateTime endTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(endMillis), ZoneId.systemDefault());
 
         final ScanOptions firstBucketScanOptions = mock(ScanOptions.class);
         final S3ScanBucketOption firstBucketScanBucketOption = mock(S3ScanBucketOption.class);
@@ -330,12 +332,18 @@ void scheduled_scan_filters_on_start_time_and_end_time_for_the_first_scan_and_do
         final ListObjectsV2Response listObjectsResponse = mock(ListObjectsV2Response.class);
         final List<S3Object> s3ObjectsList = new ArrayList<>();
 
-        final Instant objectNotBetweenStartAndEndTime = Instant.ofEpochMilli(1725907846000L).minus(500L, TimeUnit.SECONDS.toChronoUnit());
+        final Instant objectAfterStartAndEndTime = Instant.ofEpochMilli(endMillis).plus(500L, TimeUnit.SECONDS.toChronoUnit());
         final S3Object validObject = mock(S3Object.class);
         given(validObject.key()).willReturn("valid");
-        given(validObject.lastModified()).willReturn(objectNotBetweenStartAndEndTime);
+        given(validObject.lastModified()).willReturn(objectAfterStartAndEndTime);
         s3ObjectsList.add(validObject);
 
+        final Instant objectBeforeStartTime = Instant.ofEpochMilli(startMillis).minus(500L, TimeUnit.SECONDS.toChronoUnit());
+        final S3Object invalidObject = mock(S3Object.class);
+        given(invalidObject.key()).willReturn("invalid");
+        given(invalidObject.lastModified()).willReturn(objectBeforeStartTime);
+        s3ObjectsList.add(invalidObject);
+
         final List<PartitionIdentifier> expectedPartitionIdentifiers = new ArrayList<>();
         expectedPartitionIdentifiers.add(PartitionIdentifier.builder().withPartitionKey(notFirstScanBucket + "|" + validObject.key()).build());