Moved warning where str is checked

Author: jhendricks487

pandas/_libs/tslibs/timestamps.pyx

@@ -2587,6 +2587,14 @@ class Timestamp(_Timestamp):
                 tzinfo is None):
             return ts_input
         elif isinstance(ts_input, str):
+            if ts_input == "":
+                warnings.warn(
+                    "Passing an empty string to Timestamp is deprecated and will raise "
+                    "a ValueError in a future version.",
+                    FutureWarning,
+                    stacklevel = 2
+                )
+
             # User passed a date string to parse.
             # Check that the user didn't also pass a date attribute kwarg.
             if any(arg is not None for arg in _date_attributes):
@@ -2645,14 +2653,6 @@ class Timestamp(_Timestamp):
                 "Passed data is timezone-aware, incompatible with 'tz=None'."
             )
 
-        if ts_input == "":
-            warnings.warn(
-                "Passing an empty string to Timestamp is deprecated and will raise "
-                "a ValueError in a future version.",
-                FutureWarning,
-                stacklevel = 2
-            )
-
         return create_timestamp_from_ts(ts.value, ts.dts, ts.tzinfo, ts.fold, ts.creso)
 
     def _round(self, freq, mode, ambiguous="raise", nonexistent="raise"):