The 3rd season of the anime, 'Dungeon ni Deai o Motomeru no wa Machigatteiru Darō ka III (Is It Wrong to Try to Pick Up Girls in a Dungeon? III)' based on Fujino Ōmori and Suzuhito Yasuda's light novel series will premiere on October 2, 2020, as announced by the anime's official Twitter account.
The anime will air on Tokyo MX, Sun TV, KBS Kyoto, and BS11 on October 2 at 24:30 (effectively October 3 at 12:30 a.m.), and will then air on AT-X on October 3. The show will also stream in Japan on d Anime Store, U-NEXT, Anime Hōdai, GyaO!, Bandai Channel, FOD, Niconico, VideoMarket, and dTV.
The third season will feature a returning staff and cast. Rina Hidaka joins the cast as the character Wiene, who was teased at the end of the final episode of the second season. Yuka Iguchi will return to perform the anime's opening theme song "Over and Over." The band Sajou no Hana will perform the anime's ending theme song.
The first season of the anime aired from April 4, 2015, to June 27, 2015, with 13 episodes, and an OVA releasing on December 7, 2016. The second season aired from July 6, 2019, to September 28, 2019, with 12 episodes, and the second OVA releasing on January 29, 2020.