Mark Kastelic is a Slovenian racing driver competing in GT World Challenge Europe for Tresor Attempto Racing.
OneRacing holds 1 season of Mark Kastelic, from 2026 to 2026.
The most recent race on file is Portimao (Endurance Cup), finished in P45.
The tables below list every season with its championship position and points, the latest sessions one by one, and the team-mates Mark Kastelic has shared a garage with.
| Season | Series | Pos | Points |
|---|---|---|---|
| 2026 | GT World Challenge Europe | – | 0 |
| Race | Weekend | Session | Result |
|---|---|---|---|
 Portimao (Endurance Cup) | Oct 17, 2026 | Main Race | 45 |
 Barcelona (Sprint Cup) | Oct 4, 2026 | Race 2 | 27 |
| Barcelona (Sprint Cup) | Oct 3, 2026 | Race 1 | 27 |
 Zandvoort (Sprint Cup) | Sep 20, 2026 | Race 2 | 32 |
| Zandvoort (Sprint Cup) | Sep 19, 2026 | Race 1 | 33 |
