AVA- Zainadin Fazlie, who had lived in Britain for 16 years, was sent back to Afghanistan after committing a number of minor offences despite threats to his life.
Ms Fazlie found out her husband had been shot by Taliban forces after seeing an image of his dead body on Facebook last Friday.
He was granted indefinite leave to remain but was issued with a deportation notice in 2015 after receiving an eight-week suspended sentence for a violent offence.
A recent change in the law meant he was unable to exercise his right to appeal and was removed to Afghanistan in 2016.
Ms Fazlie said her husband had been suffering with depression and poor mental health when he committed the offence.
Stand Up to Racism's Weyman Bennett, who has been visiting the “Jungle” camp in Calais over the last five years, attacked the government's hostile policies towards refugees, which have paved the way for Mr Fazlie's deportation.
Mr Bennett told the Star that at the camp he had met "the dispossessed, the homeless, the abused and the neglected.
"A few victims of disasters arrive at our shores, damaged by their experiences and the fences built against them.
"Refugees and migrants are faced with abuse and neglect, and a lack of job opportunities," he said. "No wonder they sometimes commit minor crimes.”
Shadow home secretary Diane Abbott said: "This is a truly shocking story. The Tory government’s hostile environment policy ignores the fact that real people’s lives are harmed. Tragically, sometimes the consequences are fatal."