Kasimir Kaskisuo (born 2 October 1993) is a Finnish professional ice hockey goaltender for Leksands IF of the Swedish Hockey League (SHL). He has previously played for the Toronto Maple Leafs and the Nashville Predators in the National Hockey League (NHL).
On 28 March 2016, Kaskisuo signed a two-way contract with the Toronto Maple Leafs, and began play with its minor league affiliates, the Toronto Marlies of the American Hockey League (AHL), and the Orlando Solar Bears of the ECHL. On 29 May 2018, the Maple Leafs re-signed Kaskisuo to another two-way contract for two years. During the 2017–18 AHL season, the Maple Leafs loaned Kaskisuo to the AHL's Chicago Wolves.
On 12 November 2019, Kaskisuo was called up by the Toronto Maple Leafs to serve as the backup goaltender for the club. Kaskisuo made his NHL debut with the Maple Leafs several days later, on 16 November 2019.