MacRumors published a story that Apple has released watchOS 7.0.3 for Apple Watch Series 3.
Apple Releases watchOS 7.0.3 for Apple Watch Series 3 to Fix Unexpected Restart Issue
Apple today released watchOS 7.0.3, the third update to the watchOS 7 operating system that was released in September.
Apple Releases watchOS 7.0.3 for Apple Watch Series 3 to Fix Unexpected Restart Issue