Looking for logging into the Cant To Mw3 site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Cant To Mw3 site. After that you can login as usual with your login credentials.
https://community.callofduty.com/t5/Modern-Warfare-3-Forum/Cant-connect-to-MW3-online-services-PS3/td-p/7437480
https://community.activision.com/t5/Modern-Warfare-3-Forum/SOLVED-HELP-Cannot-connect-to-online-services/td-p/4438959
https://community.guitarhero.com/t5/-/-/m-p/8166320
https://gaming.stackexchange.com/questions/77435/i-have-xbox-live-but-on-mw3-my-guest-cant-play
https://www.reddit.com/r/xboxone/comments/8swi0z/cannot_sign_in_to_xbox_live_on_modern_warfare_3/
https://steamcommunity.com/app/42690/discussions/0/810923021565399125/
https://www.theguardian.com/technology/gamesblog/2011/nov/10/modern-warfare-3-internet-hatred
https://answers.microsoft.com/en-us/xbox/forum/all/cant-connect-to-xbox-live-on-mw3/3432d276-d80a-4a60-9361-3adf9b7a2b71
https://community.treyarch.com/t5/Advanced-Warfare-Support/Mw3-on-PS3-cant-find-any-games/td-p/10677708
https://community.eu.playstation.com/t5/Gaming-Network-Support/Can-t-play-Call-of-Duty-MW3-online/m-p/20656329
https://www.eurogamer.net/articles/2011-12-13-xbox-360-modern-warfare-3-online-matchmaking-problem
https://marketplace.xbox.com/en-us/Product/Modern-Warfare-3/66acd000-77fe-1000-9115-d802415608cb
http://downdetector.com/status/call-of-duty