Sabah Al-Mdwali, a mother-of-three, was found dead with 57 stab wounds on a bed in an upstairs bedroom of the couple's Gordon house in March 2015. She was 28.

An ACT Supreme Court jury found her husband, Maged Mohommed Ahmed Al-Harazi, 36, guilty of her murder.

He maintained his innocence and blamed his wife's father and brother for her death.

Defence barrister Ken Archer argued at a sentence hearing on Friday that Al-Harazi's moral culpability for the "serious" and "frenzied" attack was less because he suffered mental illness.

He said Al-Harazi's erratic behaviour before and during the murder showed "irrational aggression" suggestive of mental health problems, which were largely kept hidden due to "powerful cultural considerations".

"To admit he is 'mad' has consequences within Arabic culture that is not the same within our culture.

"It is not readily open to Yemeni people to profess mental illness."

Al-Harazi still believed he would soon be released to return to his home country with his children, he said.

Mr Archer argued his client's mental health problems and limited grasp of English would likely persist for the length of his sentence, and time in jail would weigh heavily on him.

Prosecutor Shane Drumgold suggested any sentence the court imposed should make a statement about domestic violence when a woman with three children was stabbed to death, as she breastfed, for no reason.

He stopped short of urging a life behind bars.

"We say this murder was heinous, brutal, sustained and inexplicable.

"The victim could be seen as loving and protective and rather than showing one skerrick of remorse, the accused has continued to blame others."

Mr Drumgold noted Ms Al-Mdwali was in the "sanctity" of her bedroom and breastfeeding when she was attacked. The couple's two older children were home and had been effectively orphaned.

He said Ms Al-Mdwali's multiple wounds showed the "ferocity" of the attack.

He pointed to the story Al-Harazi made up to falsely accuse his wife's father and brother of the killing, and the fact the men first learned of her murder as they were accused of committing it.

Al-Harazi's motive appeared to have been that he wanted to return to Yemen and didn't get his own way; otherwise there was "not one single mitigating factor", he said.

Earlier, the court heard there was a lack of consensus on Al-Harazi's mental health among experts.

Forensic psychologist Ahu Kocak, who observed Al-Harazi in jail, gave evidence she disagreed with several psychiatrists who had found he did not suffer a severe mental illness.

She said the process of helping Al-Harazi to adjust to the prison environment had been slow and complex due to language barriers and his refusal to engage with staff and detainees.

Al-Harazi was socially isolated and struggled to integrate, even when housed with Arabic-speaking inmates.

"They would always report there was something wrong with Mr Al-Harazi, that he was crazy."

Justice Richard Refshauge will hand down his sentence on Thursday.