(of a person) lonely and abandoned, especially through someone’s death or departure.
Merriam-Webster Online Dictionary
bereft (adjective)1.
a) or robbed of the possession or use of something - deprived usually used with of both players are instantly bereft of their poise A. E. Wier
b) lacking something needed, wanted, or expected - used with of the book is … completely bereft of an index Times Literary Supplement
2.
suffering the death of a loved one - bereaved a bereft mother