Derborence

Derborence is a 1985 French-Swiss film directed by Francis Reusser, adapted from Charles-Ferdinand Ramuz’s novel, about a young wife whose husband is presumed dead after a mountain landslide. The film was screened in competition at the 1985 Cannes Film Festival, was also shown at festivals including Montreal and Locarno, and won the César Award for Best French-Language Film in 1986.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.