Mezue ahịrịokwu na-esonụ: A mụrụ ya n'Austria, Kalajdžić bụ onye Serbia. O mere egwuregwu mbụ ya maka Austria na 14 Ọktọba 2020 na egwuregwu Nations League megide Romania. Ọ gbanwere Michael Gregoritsch na nkeji 90. N'abalị iri abụọ na ise nke ọnwa Machị afọ 2021, o nyere goolu abụọ mbụ ya n'asọmpị mba ụwa n'asọmpị 2x2 ha na Scotland gbara n'oge asọmpị iko mbaụwa FIFA nke afọ 2022. E tinyere Kalajdžić na ndị otu maka
Euro 2020, ebe o nyere goolu na mmeri 2<unk>1 mgbe oge mgbakwunye megide Italy na agba nke 16.