Place of birth
Current ASN 100 Rank
Previous ASN 100 Rank
Slonina has represented the United States at the under-15, under-16, under-17, and under-20 levels. Slonina was called into camp for the United States senior team in December 2021 but did not feature in a match. On January 21, 2022, Slonina was called into a World Cup Qualifying camp with the United States senior team but again did not feature in a match. On May 17, he was called up to the Polish senior team by coach Czes?aw Michniewicz for their upcoming Nations League fixtures against Wales, Belgium and the Netherlands. Three days later, Slonina rejected the call-up and declared his wish to represent United States on international level.
On January 25, 2023, Slonina became the youngest-ever goalkeeper to play for the United States senior team, making several saves in a 2-1 loss to Serbia.