Apple Watch Series 3 not updating

I recommend to first force restart to your apple watch but this still doesn’t work then check your Apple Watch storage because newer updates need at least 500-800md free space and as we know series 3 regular gps varient doesn’t have enough storage but at last you should free up your space and if you can’t then just reset your watch and watch space will wipe out and you will be able to update your watch.

Due to the very low memory on a Series 3 watch, yes, it can take a long time to update, if you can get it to update. I recommend if it started, to leave it alone for as long as it takes.