The 2017–18 Derde Divisie season is the second edition of the new Dutch fourth tier, formerly called Topklasse, since the restructuring of the league system in the summer of 2016.
The remaining 6 teams will play next season in the 2018–19 Derde Divisie.
Jong Almere City and Scheveningen promoted to the 2018–19 Tweede Divisie.
The numbers 15 and 16 from the 2017–18 Derde Divisie Saturday league and 3 (substitute) period winners of each of the two 2017–18 Hoofdklasse Saturday leagues, making a total of 8 teams, decide in a 2-round knockout system which 2 teams play next season in the 2018–19 Derde Divisie Saturday league.
The remaining 6 teams play next season in the 2018–19 Hoofdklasse Saturday leagues.