26 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Rupasinghe, Sayum | Horikawa, Masaki | 1-0 | B13 | 2026 Australian Championship Under 18 years | 2026-01-24 |
| Rupasinghe, Sayum | Leong, Joel | 0-1 | B50 | 2026 Australian Championship Under 18 years | 2026-01-23 |
| Rupasinghe, Sayum | Cheng, Larry | 1-0 | B40 | 2026 Australian Championship Under 18 years | 2026-01-18 |
| Rupasinghe, Sayum | Chang, Ethan | 1/2-1/2 | B13 | 2026 Australian Championship Under 18 years | 2026-01-18 |
| Rupasinghe, Sayum | Ding, Daniel (yulin) | 0-1 | B30 | Round 5: Rupasinghe, Sayum - Ding, Daniel (yulin) | 2024-07-10 |
| Rupasinghe, Sayum | Litchfield, Frederick | 1/2-1/2 | B51 | Round 7: Rupasinghe, Sayum - Litchfield, Frederick | 2024-07-09 |
| Rupasinghe, Sayum | Lane, Gary W | 0-1 | C60 | Round 8: Rupasinghe, Sayum - Lane, Gary W | 2024-07-09 |
| Rupasinghe, Sayum | Tang, Terrence | 0-1 | D01 | Round 5: Rupasinghe, Sayum - Tang, Terrence | 2024-06-09 |
| Rupasinghe, Sayum | Chakrabarty, Reyaansh | 0-1 | D01 | Round 3: Rupasinghe, Sayum - Chakrabarty, Reyaansh | 2024-06-08 |
| Sayum Rupasinghe | Austin Chen | 1/2-1/2 | D00 | Round 6: Sayum Rupasinghe - Austin Chen | 2024-01-18 |
| Sayum Rupasinghe | Joshua Barnett | 1/2-1/2 | A45 | Round 2: Sayum Rupasinghe - Joshua Barnett | 2024-01-13 |
| Rupasinghe, Sayum | Wong, Benjamin | 1-0 | C65 | 2025 SIO Challengers | |
| Rupasinghe, Sayum | Potluri Supreetha | 0-1 | B40 | 2025 SIO Challengers |