The 47-year-old man, who can only be referred to as CT because of a pseudonym order imposed by the NSW Supreme Court, was sentenced to a maximum three years in jail in 2016.

His on-off partner of more than 15 years was employed as a cleaner in March 2016 when he approached the Albury house where she was working, grabbed a glass bottle out of the recycling bin and pressed it against the neck of a nearby resident, telling him to go and get his "missus" out of the house.

CT pushed his partner to get into the house then, without warning, hit another man inside over the head with the bottle and punched him numerous times, causing fractures to his face.

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The Supreme Court heard this week the man had been released on parole in March 2018 with an electronic monitoring device, but breached parole by entering exclusion zones and testing positive for cannabis and methamphetamine - he went back into custody in October.

Forensic psychiatrist Adam Martin described CT as having schizophrenia, a substance use disorder and possibly an underlying antisocial personality disorder.

Justice Robertson Wright said NSW's Forensic Hospital, which can hold mentally-ill patients who are in custody, would be an appropriate place for treatment.

"It was particularly disturbing that the defendant had, on more than one occasion, refused to accept responsibility for the offending and deflected the blame onto others," he said.

"This lack of insight was one of the matters I found should be addressed before the defendant could be considered for release into the community, even with supervision."

He extended CT's jail sentence by another five months, until November 23 when there will be a place at The Forensic Hospital.

The man will then be placed on an extended supervision order for three years where he will remain at the hospital until he is deemed safe to release back into the community.

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