2020 Campeonato Paulista Série A3

The 2020 Campeonato Paulista Série A3 is the 27th season of the third level of the São Paulo state league under its current title and the 67th season overall.

Due to the ongoing COVID-19 pandemic, the season was indefinitely suspended on 16 March. Play was resumed on 19 September. Velo Clube were crowned champions, winning promotion alongside EC São Bernardo.

Team changes
The following teams have changed division since the 2019 season. {{column
 * 1=

To Série A3
Promoted from Segunda Divisão
 * Paulista
 * Marília

Relegated from Série A2
 * Nacional
 * Linense
 * 2=

From Série A3
Promoted to Série A2
 * Audax
 * Monte Azul

Relegated to Segunda Divisão
 * Taboão da Serra
 * São Carlos}}