As of 2024, the game is still widely played and considered by many to be one of the best entries in the franchise. The game features a robust multiplayer mode with various maps, game modes, a lore-filled Special Ops mode, and a well-received single-player campaign.

Activision has given a reason for the immense file size of Call of Duty: Modern Warfare 3, citing an "increased amount of content" available on launch day. The file size of Call of Duty: Modern Warfare 3 is well over 200 GB on consoles and PC due to a variety of content install packs, including Warzone files.