The 2018 Spielberg GP3 Series round was the third round of the 2018 GP3 Series. It was held on 30 June and 1 July 2018 at Red Bull Ring in Spielberg, Austria. The race supported the 2018 Austrian Grand Prix.

The 2018 GP3 Series was the ninth and final season of the second-tier of Formula One feeder championship and also ninth and final season under the moniker of GP3 Series, a motor racing feeder series that runs in support of the 2018 FIA Formula One World Championship and sister series Formula 2. This was the final contested season of GP3, as the series united with the FIA Formula 3 European Championship to form the FIA Formula 3 Championship.