Nylander ogé kapilih pikeun ngawakilan Swédia di 2018 IIHF World Junior Championships
. tapi Nylander mingpin Tim Swédia meunang medali pérak dina 2018 World Junior Championships dimana manéhna boga 1 gol jeung 6 assists dina 7 kaulinan. Manéhna ogé dilélér Player of the game.