Announced during the Konosuba Radio public recording special: OVA episodes for the third season of Kono Subarashii Sekai ni Shukufuku wo! 
Episodes: 

1) Red Stream Explosion! 
While Kazuma and his mates are having dinner at the guild, Luna, a receptionist, brings them a request. They need Megumin's explosion spell to face a typhoon approaching the city of Axel. Yunyun and Wiz also decide to participate, and the morale of the adventurers soars! On the day of the decisive battle, Kazuma sees the adventurers preparing for battle, and is surprised to find that they were all... 

2) Nisemono Chuui! (Watch Out For Impostors!) 
One winter day. While Kazuma was enjoying a grilled skewer at a food stall in the town of Axel, an adventurer approached him. The man said he was looking for an adventurer named “Kazuma Satou." In exchange for dinner, Kazuma told them the legend of “Kazuma Satou,” which moved the man and his party of three female adventurers to tears...

 (Source: Crunchyroll News, edited) 
Note: The anime was pre-screened in Japan theatrically for 2 weeks starting on March 14, 2025.