diff --git a/nemo_run/cli/cli_parser.py b/nemo_run/cli/cli_parser.py
index 9ceb5e47..b2522d85 100644
--- a/nemo_run/cli/cli_parser.py
+++ b/nemo_run/cli/cli_parser.py
@@ -1253,13 +1253,35 @@ def parse_single_factory(factory_str):
         return factory_fn()
 
     # Check if the value is a list
-    list_match = re.match(r"^\s*\[(.*)\]\s*$", value)
-    if list_match:
+    if value.startswith("[") and value.endswith("]"):
         # Check if arg_type is List[T], if so get T
         if get_origin(arg_type) is list:
             arg_type = get_args(arg_type)[0]
-        items = re.findall(r"([^,]+(?:\([^)]*\))?)", list_match.group(1))
-        return [parse_single_factory(item.strip()) for item in items]
+
+        # Parse list with nested structure handling
+        inner = value.strip("[] ")
+        elements = []
+        current = ""
+        nesting = 0
+
+        # Parse character by character to handle nested structures
+        for char in inner:
+            if char == "," and nesting == 0:
+                if current.strip():
+                    elements.append(current.strip())
+                current = ""
+            else:
+                if char in "([{":
+                    nesting += 1
+                elif char in ")]}":
+                    nesting -= 1
+                current += char
+
+        # Add the last element if it exists
+        if current.strip():
+            elements.append(current.strip())
+
+        return [parse_single_factory(item.strip()) for item in elements]
 
     return parse_single_factory(value)