There are no strong links between the suicide of three Queensland teenagers and the controversial closure of a youth mental health facility, a coronial inquest has found, with a grieving mother of one of the teens saying the Barrett centre had been an "absolute lifeline".

Key points: The three teenagers had been in-patients at the Barrett Adolescent Centre psychiatric unit at Wacol in Brisbane before it was closed by the Newman government in January 2014

The three teenagers had been in-patients at the Barrett Adolescent Centre psychiatric unit at Wacol in Brisbane before it was closed by the Newman government in January 2014 Within eight months of its closure, the three teenagers had taken their own lives.

Within eight months of its closure, the three teenagers had taken their own lives. Coroner John Lock found while there had been some continuity of care issues in relation to one of the teenagers, other factors played a more significant role in the suicides

Deputy State Coroner John Lock delivered the much-anticipated findings into the 2014 deaths of former Barrett Adolescent Centre residents Caitlin Wilkinson Whiticker, 18, Will Fowell, 18,and Talieha Nebauer, 17.

Mr Lock found while there had been some continuity of care issues in relation to one of the teenagers, other factors played a more significant role in the suicides.

The teenagers had been in-patients at the psychiatric unit at Wacol in Brisbane, before it was closed by the Newman Government in January 2014.

It was Queensland's only facility to provide long-term, inpatient treatment for young people with complex mental illnesses.

Within eight months of its closure, the three teenagers had taken their own lives.

'We haven't had justice'

The mother of one of the children, Justine Wilkinson, expressed her extreme disappointment at the findings handed down in Brisbane today.

"The legal system obviously does not equal the justice system … so far we haven't had justice," she said.

Will Fowell, Talieha Nebauer and Caitlin Wilkinson Whiticker died after the Barrett Centre closed in 2014. ( Supplied )

"The Commission of Inquiry finding that the transition plans were adequate was only that — they were only adequate — that doesn't necessarily mean that they were right for our children.

"Young people could go back to the Barrett centre, and they had that backstop.

"The Barrett centre was a lifeline — absolute lifeline for them — it gave them hope and it gave them the recovery, so I'm really disappointed today that there was so many things that we believe were actually wrong."

She said the teenagers had not been happy to leave the Barrett centre.

"If I'd had a buzzer, it would have been going off the whole time — justice hasn't been delivered and nobody's been held accountable for this," she said.

Plans for replacement centre dumped in 2012

An inquiry in 2016 into the closure was critical of the processes that led to the centre's closure, and that then-Health minister Lawrence Springborg had been poorly advised when he chose to redirect funds away from a replacement facility.

In her report, Commissioner Margaret Wilson QC said plans for a replacement centre were dumped in 2012 because of cost and planning pressures.

"Before that was done, there was no analysis of the needs of the young people who accessed the Barrett Adolescent Centre, no express consideration of how those young people would be cared for, no consultation with specialist child psychiatrists, and no community consultation," she said.