The scheme will be abolished on July 1 but the Human Rights Law Centre accused the government of failing to help those refused visas under it.
Sanmati Verma, a legal director at the law centre, said the government was using indefinite detention as a way to "coerce people into returning to danger".
"People in detention are deprived of their freedom, separated from their families and communities and routinely subjected to violence, isolation and deplorable conditions," she said
Detained immigrant takes bid for freedom to High Court. By Kat Wong, The Canberra Times