diff --git a/transformer_engine/pytorch/attention/dot_product_attention/utils.py b/transformer_engine/pytorch/attention/dot_product_attention/utils.py
index 567fd17c34..4548ff3932 100644
--- a/transformer_engine/pytorch/attention/dot_product_attention/utils.py
+++ b/transformer_engine/pytorch/attention/dot_product_attention/utils.py
@@ -1090,6 +1090,19 @@ def _is_fa3_supported(num_heads, num_gqa_groups, head_dim_qk, head_dim_v, qkv_dt
             logger.debug("Disabling FusedAttention for determinism reasons with post_scale_bias")
             use_fused_attention = False
             fused_attention_backend = None
+        if (
+            fused_attention_backend == FusedAttnBackend["F16_arbitrary_seqlen"]
+            and is_training
+            and cudnn_version >= (9, 7, 0)
+            and cudnn_version < (9, 18, 1)
+            and device_compute_capability >= (10, 0)
+        ):
+            logger.debug(
+                "Disabling FusedAtttention because determinism is not supported on Blackwell for "
+                "FP16/BF16 with 9.7 <= cuDNN < 9.18.1"
+            )
+            use_fused_attention = False
+            fused_attention_backend = None
 
     # use_flash_attention may have been set above
     use_flash_attention_2 = use_flash_attention and use_flash_attention_2