He has been recently diagnosed with post-traumatic stress disorder, severe depression and suicidal thoughts.

'This is a tragic story,' Sandy McFarlane, a post-traumatic stress disorder expert, told ABC1's Lateline.

'This man was extremely vulnerable and had no idea of his entitlements.

'I think it's an indictment of the workers' compensation system that a foreign student like Mr Singh is left in such a state of impoverishment that he ends up on the street and unable to continue his studies.

'Basically it was devastating for this poor man.'

Singh has also been financially exploited by a third party who had pretended to help.

Now his right to stay in Australia has almost expired.

Singh has sought an extension to his student visa but has been rejected by the migration tribunal and last week by Immigration Minister Chris Evans.

His lawyer Abbi Hamden said she told the minister that the student genuinely wanted his Master's degree and did not not want to stay in Australia long term.

'He would like to go back home with a bride and with his degree, however the minister did not take that into account and rejected his visa,' she said.

Singh says he does not want to go home as a failure.

'I will be socially outcast. That is the answer, I will be socially outcast.'