Missing Files?

This is probably a pointless and really stupid question but I deleted a mod that wasn’t working a day or so ago. I think I might’ve deleted something important, when I die the camera flies around instead of focusing on my body and I can’t go third person in vehicles or using the console or any of those mods that uses 3rd person. I’ve tried re-installing gmod but it didn’t work, I even copied the complete garry’s mod folder with all files from a friend of mine and put it in my folder and it still won’t work. Help please.