| Europa Conference League Qual. 2021/2022 - Appearances as Referee |  |
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| 22/07/2021 | Linfield FC | - | Borac Banja Luka | 4:0 | 8 | - | - |
| Europa Conference League Qual. 2021/2022 - Appearances as Referee | |
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| 22/07/2021 | Linfield FC | - | Borac Banja Luka | 4:0 | 8 | - | - |
| Complete name: | Kaarlo Oskari Hämäläinen |
| Born: | 02/04/1993 |
| Place of birth: |
Finland |
| Nationality: |
Finland |