Do people still play Black Ops 3? Still very much alive and kicking. Plenty of people still play it. I'd go on a limb and say it's probably still the most popular COD game to date - look at how much it's still selling for.

No the game is not dead. You have problems finding games mainly due to your region you live in. Unlike previous cod games, matchmaking here prevents you from joining servers where your ping is to high thus you are locked out from most world servers and can mainly play in only your regions servers.