Cika wannan jumla: Ehn ya wakilci Sweden a
2014 IIHF World U18 Championships, inda ya yi rikodin taimako uku a wasanni bakwai. Daga baya Ehn ya wakilci Sweden a Gasar Kofin Duniya na Junior Ice Hockey ta 2015, inda ya yi rikodin taimako biyu a wasanni bakwai. Ehn ya wakilci Sweden a Gasar Hockey ta Junior ta Duniya ta 2016, inda ya zira kwallaye daya da taimako daya a wasanni bakwai.