The 2003 Formula 3 Euro Series season was the first championship year of Europe's premier Formula Three series.
The championship consisted of ten rounds – each with two races – held at a variety of European circuits.
It commenced on April 26, 2003 at Hockenheimring and ended on October 26 at Circuit de Nevers Magny-Cours.
Bold – Pole Italics – Fastest Lap † — Drivers did not finish the race, but were classified as they completed over 90% of the race distance.
Rookie drivers are only eligible for the Rookie Cup title if they have not previously competed in a national or international Formula 3 championship.