The 2020–21 Championnat National 3 is the fourth season of the fifth tier in the French football league system in its current format.
After a suspension starting in October 2020, the season was declared void by the FFF on 24 March 2021 due to the ongoing COVID-19 pandemic in France, with some teams having played just three games.
On 17 July 2020, the French Football Federation ratified the constitution of the competition, and published the groups as follows:[1] On 27 July 2020, the Appeals committee of the DNCG confirmed that Athlético Marseille would be allowed to play in Championnat National 2, thus temporarily leaving a vacant place in Group D.[15] Three days later, the disciplinary committee of the FFF announced that they were demoting the club back to National 3, due to the production of fraudulent documentation at the end of the 2018–19 season.
[17] Reserve teams whose training centres are categorised as category 2B or lower cannot be promoted to Championnat National 2 by the rules of the competition.
On 28 October 2020, French President Emmanuel Macron announced a second COVID-19 lockdown, including the suspension of all amateur football, for four weeks.