DiRT 3 was delisted from official stores (like Steam) due to expiring car licenses, but downloading it from unofficial sites is still considered copyright infringement.
Since the game is no longer on Steam or the Xbox Store, here is how you can play safely: dirt-3-complete-edition-free-download-pc-hienzo-com
Some legitimate third-party retailers may still have leftover digital keys (e.g., Humble Bundle or Fanatical), though these are becoming rare. DiRT 3 was delisted from official stores (like
Sites offering "free" downloads of paid software often bundle files with viruses, miners, or spyware. Humble Bundle or Fanatical)