Prior to ASU
- One of the tallest prospects to ever sign with Arizona State, officially measuring at 7'3"
- Averaged 10.2 points, 9.4 rebounds, and 1.5 blocks per game while shooting 70.6% from the field with KK Dynamic during the 2025 Basketball League of Serbia (KLS) season
- Played for KMP Beograd in the ABA League in 2026 and started the 2026 KLS season with the club before deciding to attend college
- Represented Serbia as a member of the U20 National Team at the 2025 FIBA U20 EuroBasket for the second straight year, helping the team finish in fourth at the 16-team event
- Serbia went 3-0 in group play to win Group D over France, with Malesevic pacing the team with nine rebounds in the win over Slovenia
- Earned a spot on the U20 National Team and competed for Serbia at the 2024 FIBA U20 EuroBasket, averaging 4.5 points, 3.8 rebounds, and 1.0 blocks per game
- Made his debut in the Serbian National Team program when he played for Serbia at the 2021 FIBA U16 European Challengers
- Serbia went 5-0 with Malesevic averaging 9.3 points, 7.8 rebounds, and 1.3 blocks to clinch their spot in the 2022 FIBA U17 World Cup
- Joined KK Dynamic at the age of 16, appearing in games for the Club in the KLS (top-tier Serbian pro league) since the 2020-21 season