The 2021 Spielberg Formula 3 round was the third round of the 2021 FIA Formula 3 Championship.

It took place at the Red Bull Ring and featured three races in support of the 2021 Austrian Grand Prix from July 2nd to 4th.

Caio Collet initially set the fastest lap, before it was soon deleted giving Dennis Hauger pole for race 3, and Logan Sargeant received pole for race 1.

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