The 2019 Monza FIA Formula 3 round was a motor racing event held on 7 and 8 September 2019 at the Autodromo Nazionale di Monza, Monza, Italy.

It was the penultimate race of the 2019 FIA Formula 3 Championship, and ran in support of the 2019 Italian Grand Prix.

The Qualifying session took place on 6 September 2019, with Christian Lundgaard scoring pole position.