diff --git a/docs/user_guide/diffusion/parallelism_acceleration.md b/docs/user_guide/diffusion/parallelism_acceleration.md
index 8002f97c9..b0225e2ff 100644
--- a/docs/user_guide/diffusion/parallelism_acceleration.md
+++ b/docs/user_guide/diffusion/parallelism_acceleration.md
@@ -32,7 +32,7 @@ The following table shows which models are currently supported by parallelism me
 | **Qwen-Image-Edit-2509** | `Qwen/Qwen-Image-Edit-2509`          |     ✅      |    ✅    |      ✅       |        ✅        |         ❌          |
 | **Qwen-Image-Layered**   | `Qwen/Qwen-Image-Layered`            |     ✅      |    ✅    |      ✅       |        ✅        |         ❌          |
 | **Z-Image**              | `Tongyi-MAI/Z-Image-Turbo`           |     ✅      |    ✅    |      ❌       |  ✅ (TP=2 only)  |         ✅          |
-| **Stable-Diffusion3.5**  | `stabilityai/stable-diffusion-3.5`   |     ❌      |    ❌    |      ❌       |        ✅        |         ❌          |
+| **Stable-Diffusion3.5**  | `stabilityai/stable-diffusion-3.5`   |     ❌      |    ❌    |      ❌       |        ✅        |         ✅          |
 | **FLUX.2-klein**         | `black-forest-labs/FLUX.2-klein-4B`  |     ❌      |    ❌    |      ❌       |        ✅        |         ❌          |
 | **FLUX.1-dev**           | `black-forest-labs/FLUX.1-dev`       |     ❌      |    ❌    |      ✅       |        ✅        |         ❌          |
 
@@ -85,7 +85,7 @@ outputs = omni.generate(
 VAE patch parallelism distributes the VAE decode workload across multiple ranks by splitting the latent spatially. It is configured via `DiffusionParallelConfig.vae_patch_parallel_size` and can be combined with other parallelism methods (e.g., TP).
 
 !!! note "Enablement and feature gate"
-    - VAE patch parallelism is currently **enabled only for validated pipelines** (currently: `Tongyi-MAI/Z-Image-Turbo`).
+    - VAE patch parallelism is currently **enabled only for validated pipelines** (currently: `Tongyi-MAI/Z-Image-Turbo`, `stabilityai/stable-diffusion-3.5`).
     - If `vae_patch_parallel_size > 1` is set for a validated pipeline, vLLM-Omni will automatically enable `vae_use_tiling` as a safety gate. (We use `vae_use_tiling` because it indicates the VAE supports diffusers tiling parameters like `tile_latent_min_size` and `tile_overlap_factor`.)
 
 #### Offline Inference
diff --git a/vllm_omni/diffusion/registry.py b/vllm_omni/diffusion/registry.py
index bb39d972c..ed99b1473 100644
--- a/vllm_omni/diffusion/registry.py
+++ b/vllm_omni/diffusion/registry.py
@@ -125,6 +125,7 @@ DiffusionModelRegistry = _ModelRegistry(
 
 _VAE_PATCH_PARALLEL_ALLOWLIST = {
     # Only enable for models we have validated end-to-end.
+    "StableDiffusion3Pipeline",
     "ZImagePipeline",
     "NextStep11Pipeline",
 }