Mario Kart 8 Deluxe Update 3.0.3 _verified_ Jun 2026

These changes primarily ensure the safety and longevity of online play, protecting players from potential exploits during matches. Gameplay and Stability

The 3.0.3 update for Mario Kart 8 Deluxe is a relatively small but significant patch that focuses on balancing and tweaking the game's online multiplayer mode. According to Nintendo's official patch notes, this update aims to improve the overall online experience, addressing some of the community's most pressing concerns.