| Country: | Italy |
| Autodromo Nazionale di Monza | |
| Caption: | Layout of the Monza Circuit |
| Year: | 2020 |
| Location: | Autodromo Nazionale di Monza Monza, Italy |
| Course: | Permanent racing facility |
| Course Km: | 5.793 |
| Course Mi: | 3.600 |
| Type R1: | Race 1 |
| Date R1: | 5 September |
| Pole Driver Country R1: | FRA |
| Laps R1: | 22 |
| Pole Driver R1: | Théo Pourchaire |
| Pole Team R1: | ART Grand Prix |
| Pole Time R1: | 1:37.301 |
| First Driver Country R1: | DEN |
| First Driver R1: | Frederik Vesti |
| First Team R1: | Prema Racing |
| Second Driver Country R1: | FRA |
| Round No: | 8 |
| Season No: | 9 |
| Second Driver R1: | Théo Pourchaire |
| Second Team R1: | ART Grand Prix |
| Second Team R2: | ART Grand Prix |
| Fast Team R1: | Prema Racing |
| Fast Time R1: | 1:39.877 |
| Fast Lap R1: | lap 6 |
| Type R2: | Race 2 |
| Date R2: | 6 September |
| Laps R2: | 22 |
| First Driver Country R2: | GBR |
| Third Driver Country R1: | AUS |
| First Team R2: | HWA Racelab |
| Second Driver Country R2: | FRA |
| Second Driver R2: | Théo Pourchaire |
| First Driver R2: | Jake Hughes |
| Third Driver Country R2: | RUS |
| Third Driver R2: | Aleksandr Smolyar |
| Third Team R2: | ART Grand Prix |
| Fast Driver Country R2: | RUS |
| Fast Driver R2: | Aleksandr Smolyar |
| Fast Team R2: | ART Grand Prix |
| Fast Time R2: | 1:40.208 |
| Third Driver R1: | Oscar Piastri |
| Third Team R1: | Prema Racing |
| Fast Driver Country R1: | DEN |
| Fast Driver R1: | Frederik Vesti |
| Fast Lap R2: | lap 17 |
The 2020 Monza FIA Formula 3 round is a motor racing event held on 5 and 6 September 2020 at the Autodromo Nazionale di Monza in Monza, Italy. It was the penultimate round of the 2020 FIA Formula 3 Championship, and ran in support of the 2020 Italian Grand Prix.
With Frederik Vesti's win and Oscar Piastri finishing in third in the first race, Prema Racing prematurely secured the teams' championship back-to-back with three races to spare.
Sophia Flörsch returned to drive for Campos Racing, with Andreas Estner, her replacement in Spa, returning to the Euroformula Open Championship.
The Qualifying session took place on 4 September 2020, with Théo Pourchaire setting the fastest laptime of the session. However, him, Smolyar, Chovet, Zendeli, Caldwell, Fernández, Beckmann, Vesti and championship leader Oscar Piastri were all penalized for blocking the track in Qualifying, therefore allowing Liam Lawson, who had initially set the fourth-best laptime, to inherit pole position.
| Driver | Points | |||
|---|---|---|---|---|
| 1 | 1 |  Oscar Piastri | 160 | |
| 1 | 2 |  Logan Sargeant | 152 | |
| 2 | 3 |  Théo Pourchaire | 136 | |
| 4 |  Liam Lawson | 127 | ||
| 2 | 5 | David Beckmann | 123.5 |
| Team | Points | |||
|---|---|---|---|---|
| 1 |  Prema Racing | 429.5 | ||
| 2 | Trident | 227.5 | ||
| 3 | ART Grand Prix | 214 | ||
| 4 |  Hitech Grand Prix | 151 | ||
| 5 | MP Motorsport | 103 |
|- style="text-align:center"|width="35%"|Previous race:
|width="30%"|FIA Formula 3 Championship
2020 season|width="40%"|Next race:
