diff --git a/litellm/litellm_core_utils/get_litellm_params.py b/litellm/litellm_core_utils/get_litellm_params.py
index b12c715c9f5..588356b0178 100644
--- a/litellm/litellm_core_utils/get_litellm_params.py
+++ b/litellm/litellm_core_utils/get_litellm_params.py
@@ -43,6 +43,7 @@ OPTIONAL_KWARGS_KEYS: Final = (
             "azure_scope",
             "timeout",
             "gcs_bucket_name",
+            "s3_bucket_name",
             "bucket_name",
             "vertex_credentials",
             "vertex_project",
diff --git a/tests/test_litellm/litellm_core_utils/test_get_litellm_params.py b/tests/test_litellm/litellm_core_utils/test_get_litellm_params.py
index 956da571d43..e86608aa6d0 100644
--- a/tests/test_litellm/litellm_core_utils/test_get_litellm_params.py
+++ b/tests/test_litellm/litellm_core_utils/test_get_litellm_params.py
@@ -73,6 +73,17 @@ class TestGetLitellmParamsKwargsExtraction:
         for key in _OPTIONAL_KWARGS_KEYS:
             assert result[key] == f"val_{key}"
 
+    def test_s3_bucket_name_survives_extraction(self):
+        """s3_bucket_name reaches litellm_params, like its gcs_bucket_name counterpart.
+
+        Bedrock file retrieval resolves the bucket from litellm_params or the
+        AWS_S3_BUCKET_NAME environment variable. Dropping the key here left the
+        environment variable as the only way to configure it.
+        """
+        result = get_litellm_params(s3_bucket_name="my-bucket", gcs_bucket_name="my-gcs-bucket")
+        assert result["s3_bucket_name"] == "my-bucket"
+        assert result["gcs_bucket_name"] == "my-gcs-bucket"
+
 
 class TestGetLitellmParamsBaseModel:
     """Verify base_model resolution precedence."""