| U21 EURO Qualifiers 2021/2022 - Appearances as Referee |  |
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| 04/06/2021 | Kazakhstan | - | Belgium | 1:3 | 2 | - | - |
| 07/09/2021 | England | - | Kosovo | 2:0 | 2 | - | - |
| U21 EURO Qualifiers 2021/2022 - Appearances as Referee | |
|
|
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| 04/06/2021 | Kazakhstan | - | Belgium | 1:3 | 2 | - | - |
| 07/09/2021 | England | - | Kosovo | 2:0 | 2 | - | - |
| Complete name: | Kaarlo Oskari Hämäläinen |
| Born: | 02/04/1993 |
| Place of birth: |
Finland |
| Nationality: |
Finland |