So just unsubscribe from them in the Steam Workshop and they should be gone forever unless you reinstall them. These are the images from the steam workshop and they also should have there code names.) Also once you have deleted these maps, when you go back into Black Ops 3 they should be still there if not that's fine. (If you want to keep some of the maps and don't know which one is which, just click inside the folder and there should be two preview images. These folders have all the maps scripting and everything inside, deleting these folders delete the map. Step 10: There should be a number of Folders (Depending on how many maps/mods you have. Step 2: Click on This PC Step 3: Click onto Local Disk Step 4: Click on Program Files (x86) Step 5: Click on Steam Step 6: Click on SteamApps Step 7: Click on Workshop Step 8: Click on Content Step 9: There should be two folders, if not that's okay. This is how to uninstall the crappy not finished maps that you don't like. Go to Configuration Files, edit GameUserSettings.ini and add the IDs on the Mods field: (For Example 'ModIDs': '1630105471,1629814776',) Press Steam Workshop button on your control panel. Downloading crappy not finished maps can eat away at your storage. This guide will help you on how to install mods to your server.

How to delete steam mods