[4] He continued with RIG Mark in the second-tier Superettan in 2020–21 before the season was cancelled in February 2021 due to the COVID-19 pandemic.

[4] Klintman enrolled at Sunrise Christian Academy in Bel Aire, Kansas, for the 2021–22 U.S. high school year.

[10] Klintman initially declared for the 2023 NBA draft[11][12] and later informed Wake Forest that he would not return to the team for the 2023–24 season.

[17] Klintman played for the Sweden men's national under-18 basketball team in Finland in the Nordic championships where they won the gold medal.

Klintman played for the Sweden under-20 basketball team in the 2022 FIBA U20 European Championship Division B.