[1] In February 2019, Pokuševski was invited for the NBA All-Star Basketball Without Borders Global Camp in Charlotte, North Carolina, but eventually missed the event after being rejected for a U.S.

[5][6] Pokuševski started in eight of his 11 appearances in the Greek A2, averaging 10.8 points, 7.9 rebounds, 3.1 assists, 1.3 steals and 1.8 blocks in 23.1 minutes per game.

[17] On 3 February 2021, Pokuševski received his first assignment at the Oklahoma City Blue, the Thunder's affiliate team in the NBA G League[18] and on 14 March, he made his first NBA career start where he scored 23 points, including five 3-pointers, grabbed a career-high 10 rebounds and dished out 4 assists in a 128–122 win over the Memphis Grizzlies, becoming the third Thunder rookie (following Russell Westbrook and Darius Bazley) to post a 20–10 double-double.

Pokuševski also became the second-youngest player in NBA history to make five three-pointers in a game behind only LeBron James in 2004.

[26] From December 2022 to March 2023, Pokuševski was unable to play due to a non-displaced tibial plateau fracture in his left leg.

[31][32] Pokuševski was a member of the Serbian national under-17 team that competed at the 2018 FIBA Under-17 World Cup, in Argentina.

[33] Pokuševski was a member of the Serbian national under-18 team that competed at the 2019 FIBA Under-18 European Championship, in Volos, Greece.

[34] Initially at the preliminary Serbia roster for EuroBasket 2022, Pokuševski was cut from the squad due to disapproval of the Thunder.

Due to the Kosovo War in 1999, his family escaped to Podgorica (nowadays in Montenegro), and moved to Belgrade, Serbia, afterwards, where Pokuševski was born in 2001.

[39] After signing a youth team contract with the Greek basketball club Olympiacos, Pokuševski moved to Greece in 2015, at the age of 13.