| U19 EURO Qualifiers 2022/2023 - Appearances as Assistant | ||||
| 22/03/2023 | Belgium | - | Slovenia | 0:0 |
| 25/03/2023 | Slovenia | - | Italy | 0:0 |
| 28/03/2023 | Italy | - | Belgium | 2:2 |
| U19 EURO Qualifiers 2022/2023 - Appearances as Assistant | ||||
| 22/03/2023 | Belgium | - | Slovenia | 0:0 |
| 25/03/2023 | Slovenia | - | Italy | 0:0 |
| 28/03/2023 | Italy | - | Belgium | 2:2 |
| Complete name: | Lasse Koslowski |
| Born: | 14/07/1987 |
| Place of birth: |
Berlin, 
Germany |
| Residence: | Berlin |
| Nationality: |
Germany |
| Profession: | selbständig |
| Club: | Frohnauer SC |