Klintman was born in
Malmö, Sweden, to a Swedish mother and a father from
Senegal. He attended Sweden's RIG Mark Academy in
Kinna. In the 2019–20 season, he played 13 games for RIG Mark in the third-tier
Basketettan. 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. He played six games for
Borås Basket in the first-tier
Basketligan to finish the season. He was rated a four-star
recruit and initially committed to playing college basketball for
Maryland. He later decommitted from Maryland and committed to play for
Colorado. Klintman decommitted a second time and ultimately signed to play for
Wake Forest. ==College career==