diff --git a/src/main/java/com/alibaba/fastjson/parser/deserializer/DefaultFieldDeserializer.java b/src/main/java/com/alibaba/fastjson/parser/deserializer/DefaultFieldDeserializer.java
index 83f3b0461d..3edc8de8b9 100644
--- a/src/main/java/com/alibaba/fastjson/parser/deserializer/DefaultFieldDeserializer.java
+++ b/src/main/java/com/alibaba/fastjson/parser/deserializer/DefaultFieldDeserializer.java
@@ -64,7 +64,9 @@ public void parseField(DefaultJSONParser parser, Object object, Type objectType,
             }
             if (fieldType != objectType) {
                 fieldType = FieldInfo.getFieldType(this.clazz, objectType, fieldType);
-                fieldValueDeserilizer = parser.getConfig().getDeserializer(fieldType);
+                if (fieldValueDeserilizer == null) {
+                    fieldValueDeserilizer = parser.getConfig().getDeserializer(fieldType);
+                }
             }
         }
 
diff --git a/src/test/java/com/alibaba/json/bvt/issue_3600/Issue3693.java b/src/test/java/com/alibaba/json/bvt/issue_3600/Issue3693.java
new file mode 100644
index 0000000000..195129a425
--- /dev/null
+++ b/src/test/java/com/alibaba/json/bvt/issue_3600/Issue3693.java
@@ -0,0 +1,109 @@
+package com.alibaba.json.bvt.issue_3600;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.TypeReference;
+import com.alibaba.fastjson.annotation.JSONField;
+import com.alibaba.fastjson.parser.DefaultJSONParser;
+import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
+import com.alibaba.fastjson.serializer.JSONSerializer;
+import com.alibaba.fastjson.serializer.ObjectSerializer;
+import junit.framework.TestCase;
+
+import java.lang.reflect.Type;
+
+public class Issue3693 extends TestCase {
+
+    public void test_for_issue() throws Exception {
+        Model<ModelProperties> model = new Model<ModelProperties>("hello 世界", new ModelProperties("红色", 66));
+        String json = JSON.toJSONString(model);
+        assertEquals("{\"name\":\"hello 世界\",\"properties\":\"{\\\"color\\\":\\\"红色\\\",\\\"size\\\":66}\"}", json);
+
+        Model<ModelProperties> deserializedModel = JSON.parseObject(json, new TypeReference<Model<ModelProperties>>() {
+        });
+        assertNotNull(deserializedModel);
+        assertEquals("hello 世界", deserializedModel.getName());
+        assertNotNull(deserializedModel.getProperties());
+        assertEquals("红色", deserializedModel.getProperties().getColor());
+        assertEquals(66, deserializedModel.getProperties().getSize());
+    }
+
+
+    static class Model<T> {
+        private String name;
+        @JSONField(serializeUsing = MyCodec.class, deserializeUsing = MyCodec.class)
+        private T properties;
+
+        Model() {
+        }
+
+        Model(String name, T properties) {
+            this.name = name;
+            this.properties = properties;
+        }
+
+        public String getName() {
+            return this.name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        public T getProperties() {
+            return this.properties;
+        }
+
+        public void setProperties(T properties) {
+            this.properties = properties;
+        }
+    }
+
+
+    static class ModelProperties {
+        private String color;
+        private int size;
+
+        ModelProperties() {
+        }
+
+        ModelProperties(String color, int size) {
+            this.color = color;
+            this.size = size;
+        }
+
+        public String getColor() {
+            return this.color;
+        }
+
+        public void setColor(String color) {
+            this.color = color;
+        }
+
+        public int getSize() {
+            return this.size;
+        }
+
+        public void setSize(int size) {
+            this.size = size;
+        }
+    }
+
+
+    public static class MyCodec implements ObjectSerializer, ObjectDeserializer {
+        @Override
+        public int getFastMatchToken() {
+            return 0;
+        }
+
+        @Override
+        public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) {
+            serializer.write(JSON.toJSONString(object));
+        }
+
+        @Override
+        public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
+            String json = parser.parseObject(String.class);
+            return JSON.parseObject(json, type);
+        }
+    }
+}