The Formula 3 Euro Series was a European-based junior single seater formula for Formula Three chassis that was launched (in its current form) in 2003 as a merger of the French Formula Three Championship and German Formula Three Championship. The Formula Three category, including this championship, is part of the established career ladder up which European drivers progress to the Formula One world championship, the highest form of single seater racing defined by the Fédération Internationale de l'Automobile (FIA), motorsport's world governing body.