"Family tragedy" refers to a very sad and unfortunate event that happens within a family, which can cause a lot of pain and grief for the people involved. Full definition
Setting the feeling of family tragedy could have been done in many ways, and most of them don't involve the death of a child. (gamecritics.com)
But she also struggled with her role as first lady, with feelings of being an outsider and with family tragedy: Only one of her four children survived her. (bookpage.com)
Now I hate that the end of my breastfeeding relationship with my girls is tied into this terrible awful family tragedy - this worst thing that has ever happened in our lives. (milkandmotherhood.com)