diff --git a/gptqmodel/models/auto.py b/gptqmodel/models/auto.py
index 600d79451..d8d705064 100644
--- a/gptqmodel/models/auto.py
+++ b/gptqmodel/models/auto.py
@@ -215,6 +215,7 @@
     "exaone": ExaOneQModel,
     "grinmoe": GrinMoeQModel,
     "mllama": MLlamaQModel,
+    "marin": Qwen3QModel,
     "granite": LlamaQModel, # 100% llama clone
     "mobilellm": MobileLLMQModel,
     "hymba": HymbaQModel,
diff --git a/gptqmodel/models/definitions/qwen3.py b/gptqmodel/models/definitions/qwen3.py
index 0fd272c9c..c071dca9b 100644
--- a/gptqmodel/models/definitions/qwen3.py
+++ b/gptqmodel/models/definitions/qwen3.py
@@ -7,4 +7,27 @@
 
 
 class Qwen3QModel(LlamaQModel):
-    pass
+    """
+    Qwen3 inherits the Llama-style layout but inserts Q/K RMS norm layers
+    ahead of the attention projections. We mark those helper modules as
+    non-quantized so the layer walker captures the complete structure.
+    """
+
+    module_tree = [
+        "model",
+        "layers",
+        "#",
+        {
+            "input_layernorm": ("input_layernorm:!",),
+            "self_attn": (
+                "q_norm:!",
+                "k_norm:!",
+                "q_proj:0",
+                "k_proj:0",
+                "v_proj:0",
+                "o_proj:1",
+            ),
+            "post_attention_layernorm": ("post_attention_layernorm:!",),
+            "mlp": ("gate_proj:0", "up_proj:0", "down_proj:1"),
+        },
+    ]
diff --git a/tests/models/test_marin.py b/tests/models/test_marin.py
new file mode 100644
index 000000000..e701a4d5e
--- /dev/null
+++ b/tests/models/test_marin.py
@@ -0,0 +1,34 @@
+# SPDX-FileCopyrightText: 2024-2025 ModelCloud.ai
+# SPDX-FileCopyrightText: 2024-2025 qubitium@modelcloud.ai
+# SPDX-License-Identifier: Apache-2.0
+# Contact: qubitium@modelcloud.ai, x.com/qubitium
+
+from accelerate import init_empty_weights
+from transformers import AutoConfig, AutoModelForCausalLM
+
+from model_test import ModelTest
+
+from gptqmodel.models.definitions.qwen3 import Qwen3QModel
+from gptqmodel.quantization.config import VRAMStrategy
+
+
+class TestMarin(ModelTest):
+    NATIVE_MODEL_ID = "/monster/data/model/marin-32b-base"
+    VRAM_STRATEGY = VRAMStrategy.BALANCED
+    # Marin inherits Qwen3's backbone with QK-Norm attention.
+
+    def test_marin_module_tree(self):
+        config = AutoConfig.from_pretrained(self.NATIVE_MODEL_ID, trust_remote_code=True)
+        with init_empty_weights(include_buffers=True):
+            shell = AutoModelForCausalLM.from_config(config, trust_remote_code=True)
+
+        decoder_layer = shell.model.layers[0]
+        self.assertTrue(hasattr(decoder_layer.self_attn, "q_norm"))
+        self.assertTrue(hasattr(decoder_layer.self_attn, "k_norm"))
+        self.assertTrue(hasattr(decoder_layer.self_attn, "q_proj"))
+        self.assertTrue(hasattr(decoder_layer.self_attn, "o_proj"))
+        self.assertIn("q_norm:!", Qwen3QModel.module_tree[3]["self_attn"])
+        self.assertIn("k_norm:!", Qwen3QModel.module_tree[3]["self_attn"])
+
+    def test_marin(self):
+        self.quant_lm_eval()