Please recommend the best but not well known movie from your country

Mine would be C.R.A.Z.Y. (2005) by Jean-Marc Vallée (Québecois director also behind Dallas Buyer Club, Sharp Objects and Big Little Lies). It's a great depiction of the way his movies and series closely intertwined with music. The acting from the father, mother and son Zachary is incredible.

In a few words, it tells the story of a conservative-ish family in the 60s and 70s, with 5 sons who all have a very different dynamic with their father.

That would be my recommendation. What's yours?