The GP3 Series, or GP3 for short, is a single seater motor racing series launched in 2010 as a feeder series for the GP2 Series, introduced by GP2 organiser Bruno Michel.
GP3 follows the entire European leg of the Formula One series and the GP2 (now Formula 2) series as a support race for the two. In 2012, the series visited the Monaco street circuit after 2 years of attempts, as they were always unable to beforehand due to lack of room. Like the GP2 series, GP3 gives drivers the experience of the Grand Prix environment, and takes advantage of the infrastructure, such as marshals and medical facilities, in place for the Formula One events. GP3 Series mainly races on European circuits, but has appearances on other international race tracks as well with their most recent races in the only 2015 season at the Bahrain International Circuit in Bahrain and the Yas Marina Circuit in United Arab Emirates since 2010 season but GP3 Series are planning for more international races such as Albert Park, Austin, Interlagos, Marina Bay, Mexico City, Montreal, Shanghai and Suzuka in the future as the GP3 Series international expansion project plan.
Many drivers have since stepped up to GP2 since the series began, with the 2010 champion Esteban Gutiérrez, Pål Varhaug and ninth-place finisher Stefano Coletti being the first to do so for the 2011 season. 2011 champion Valtteri Bottas did not follow suit however, and instead joined Williams F1 as a reserve driver. Meanwhile, James Calado, Rio Haryanto, Simon Trummer, Tom Dillmann and Nigel Melker all joined GP2 for the 2012 season. Other drivers who have graduated to other series are James Jakes who moved to the IndyCar Series for 2011, Josef Newgarden to the Indy Lights series in 2011 and Alexander Rossi and Robert Wickens who moved to the Formula Renault 3.5 Series in 2011 and Lewis Williamson in 2012.
In the series' short history, nine drivers have gone on to compete, or are competing in Formula One currently after GP3. These include former champions Gutiérrez, Kvyat, Bottas and Ocon for Sauber, Red Bull Racing, Williams and Manor respectively, Jean-Éric Vergne and Carlos Sainz Jr. for Toro Rosso.
In 2019, the series will merge with the FIA Formula 3 European Championship to form the FIA Formula 3 Championship.