Nobody's Child

Nobody's Child is a 1986 American made-for-television drama film directed by Lee Grant which won a Directors Guild of America Award. It is based on the autobiographical account of the same title by Marie Balter who was sent to a mental institution aged sixteen, with a script adapted by writers Mary Gallagher and Ara Watson. The cast includes Marlo Thomas, Ray Baker, Caroline Kava, and Anna Maria Horsford.

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