| Country ↑ | Members | Leaders | Guests | G | S | B | H | Total |
|---|---|---|---|---|---|---|---|---|
 Bosnia and Herzegovina | 4 | 2 | - | - | - | 1 | - | 1 |
 Bulgaria | 4 | 2 | - | - | 4 | - | - | 4 |
 Cyprus | 4 | 2 | - | - | - | 2 | - | 2 |
 Greece | 4 | 2 | - | - | 1 | 1 | - | 2 |
 Moldova | 1 | - | 1 | - | 1 | - | - | 1 |
 North Macedonia | 7 | 4 | - | - | - | 1 | - | 1 |
 Poland | 4 | 2 | 1 | 1 | 2 | - | - | 3 |
 Romania | 4 | 2 | - | 3 | - | 1 | - | 4 |
 Serbia | 7 | 4 | - | - | - | 2 | - | 2 |
 Slovenia | - | - | 1 | - | - | - | - | - |