Kammala jumla mai zuwa: Holmström ya wakilci Sweden a 2013 Ivan Hlinka Memorial Tournament, inda ya rubuta daya taimakawa a wasanni hudu. Daga baya ya wakilci Sweden a
2014 IIHF World U18 Championships, inda ya kasance na biyu-manyan scorer a lokacin gasar, rikodin uku a raga da takwas taimaka a wasanni bakwai. Holmström ya wakilci Sweden a Gasar Kofin Duniya ta Hockey ta Duniya ta 2015, inda ya zira kwallaye daya da kuma taimakawa shida a wasanni bakwai. Holmström ya sake wakiltar Sweden a Gasar Hockey ta Junior ta Duniya ta 2016, inda ya zira kwallaye guda daya da taimakawa biyar a wasanni bakwai.