Tuhia he haere tonu mo tenei whitianga - I te marama o Tihema 2018, i whakaingoatia a Lafrenière ki te 2019 IIHF World Junior Championship o Team Canada
te rārangi. Ko ia te mema taitamariki o te raarangi me te tuaiwa o nga taiohi o mua ki te tohu i a Canada i te World Juniors. I eke ia i tana whaainga tuatahi, me tana whaainga anake o te whakataetae i te wikitoria a Canada 5<unk>1 ki te Czech Republic. I muri mai ka whakakorea a Canada e Team Finland i te hauwhā o te whiringa toa.