The 2026 FIA Formula 3 Championship is a motor racing championship for Formula 3 cars sanctioned by the Fédération Internationale de l'Automobile (FIA). The championship is the seventeenth season of Formula 3 racing and the eighth season run under the FIA Formula 3 Championship moniker. FIA Formula 3 is an open-wheel racing category serving as the third tier of formula racing in the FIA Global Pathway. The category is run in support of selected rounds of the 2026 FIA Formula One World Championship. As the championship is a spec series, all teams and drivers competing in the championship run the same car, the Dallara F3 2025.