The only way to play this specific title on a computer is through console emulation:
A free-to-play standalone title available on PC. Why was it never on PC? Call of Duty 3 PC-játék ingyenes letöltés
An alternative for running the Xbox 360 version. The only way to play this specific title
Both are officially available on PC through Steam and Battle.net. Call of Duty: Black Ops III : Officially available on PC. Call of Duty 3 PC-játék ingyenes letöltés