The 2017–18 Championnat National 3 is the first season of the fifth tier in the French football league system in its current format.
The team had previously been excluded due to financial issues, but successfully appealed the ruling.
Generally, three teams will be relegated from each group to the top league in their region, subject to reprieves.
As of 19 June, all promotions had been verified by the FFF and DNCG[23][24] The title of Champion of Championnat National 3 is awarded to the team with the best record in games against the teams that finished in 2nd to 6th place in their group, with goal difference to separate ties.
Libourne, Cozes, Feytiat, Changé, Poiré-sur-Vie,[a] Mulsanne-Teloché, Dreux,[a] St Cyr-sur-Loire, Bastia-Borgo (res), Île-Rousse, Saint-Apollinaire, Saint-Vit, Quetigny, Clémenceau Besançon, Metz (res), Prix-lès-Mézières, Lunéville, Pagny-sur-Moselle, Erstein, Trémery, Castanet, Luzenac, Narbonne, Roye Noyon, Ailly, Wasquehal, Saint-Amand, USON Mondeville,[a] Dives-Cabourg, Concarneau (res), Guichen, Ergué-Gabéric, Saint-Ouen-l'Aumône, Sénart-Moissy, Volvic and Bourg-en-Bresse (res) were relegated to the Division d'Honneur of their respective regional leagues.