*Club domestic league appearances and goals, correct as of 11:55, 11 June 2018 (UTC) ‡ National team caps and goals, correct as of 11:55, 11 June 2018 (UTC)
Lehtinen has played at international level for Finland from under-15 to under-20 level, but was called up by Switzerland's under-18 set up in 2014.[1] He played once, in a friendly against Italy.[2]
A dual citizen of Finland and Switzerland, Lehtinen was born to a Finnish father and Swiss mother in Finland, where he has lived most of his life. His father, Kalle Lehtinen, is a former footballer.[5]