Domestic violence campaigner Rosie Batty has appealed to Immigration Minister Peter Dutton to allow a woman who killed her abusive husband to stay in Australia.

Key points: Sri Lankan-born doctor Chamari Liyanage killed her abusive husband Dinendra Athukorala in 2014

Sri Lankan-born doctor Chamari Liyanage killed her abusive husband Dinendra Athukorala in 2014 Dr Liyanage had her visa cancelled while serving time in a WA prison

Dr Liyanage had her visa cancelled while serving time in a WA prison Rosie Batty has appealed to Peter Dutton to let Dr Liyanage stay in Australia

Sri Lankan-born doctor Chamari Liyanage is serving a four-year prison term in Greenough Regional Prison after being convicted of the manslaughter of fellow doctor Dinendra Athukorala at their home in the West Australian town of Geraldton in June 2014.

She was acquitted of the more serious charge of murder and has been eligible to apply for parole since June.

Rosie Batty says Dr Chamari Liyanage should be allowed to stay in Australia. ( ABC News: Adrienne Francis )

Her application for parole is due to be heard early next year but if granted, she is likely to be moved into immigration detention and could be deported because her visa was cancelled whilst behind bars.

In a letter obtained by the ABC, Ms Batty has written to Mr Dutton requesting he revoke the cancellation of Dr Liyanage's visa.

"Like my son and myself, Dr Liyanage is a victim of family violence," she wrote.

"I understand that Dr Liyanage suffered severe and ongoing domestic violence for the entire period of her marriage, including physical and sexual assault and emotional abuse and she acted to protect herself."

During her trial, the court heard the couple's five-year marriage was defined by the "worst kind" of escalating sexual, physical and emotional abuse.

The court also heard Athukorala kept 13 terabytes of encrypted child exploitation and bestiality images, which he would sometimes force Dr Liyanage to watch.

'She felt more at peace in prison'

Dr Chamari Liyanage with her husband Dinendra Athukorala. ( Supplied: 7 News )

Ms Batty, whose son Luke was murdered by his father in 2015, said shame and fear often paralysed victims from speaking out or seeking help.

"I find it a heartbreaking and insightful statement that, reported by Dr Liyanage's psychiatrist to the court, Dr Liyanage felt more at peace in prison than she had in a number of years," she wrote.

Ms Batty also noted Dr Liyanage's desire to raise awareness about domestic violence and that she had taken steps towards her rehabilitation.

"I have learnt about the power of the voice of victim survivors in reaching out to others and in inspiring others to leave a violent relationship," Ms Batty wrote.

"I am supportive of Dr Liyanage being permitted to remain in Australia.

"Australia is a country to which people like Dr Liyanage come to live in the hope they will be able to live free safe lives.

"Your decision to revoke the cancellation of Dr Liyanage's visa will demonstrate a compassionate Australian Government that truly understands the plight of family and domestic violence victims."