The High Court has refused to hear an appeal on behalf of a four-year-old girl whose Tamil family are fighting to avoid deportation and return home to the Queensland town of Biloela.
The litigation guardian of Tharnicaa Murugappan had sought special leave to appeal to the nation's highest court, but that was declined on Thursday.
Earlier this year the full bench of the Federal Court upheld a judge's ruling that Tharnicaa had been denied procedural fairness when trying to apply for a protection visa to stay in Australia.
However, the court also upheld a judgement that Tharnicaa had not made a valid visa application back in 2019 and the family sought to challenge that in the High Court.
In June Immigration Minister Alex Hawke granted three-month bridging visas to Tharnicaa's father Nades, mother Priya and older sister Kopika, who like Tharnicaa was born in Australia.
Mr Hawke said at the time his decision allowed the three family members to live in Perth "while the youngest child's medical care, and the family's legal matters, are ongoing" and that Tharnicaa's "visa status is unchanged".
Responding to Thursday's High Court decision, Mr Hawke said "the family has a number of other ongoing legal matters" and that it would be "therefore inappropriate for me to comment further".
Before Tharnicaa was born her parents applied for protection visas but were unsuccessful, as were their court challenges on fairness grounds.
The family had been in detention for three years, being kept on Christmas Island from August 2019 when an urgent injunction stopped their deportation mid-flight.
They moved back to the mainland after Tharnicaa needed hospital treatment for a blood infection.
Supporters say both girls continue to receive treatment for a variety of medical issues, including recurrent infections due to immune system stress.
"These days awaiting High Court outcomes are always very stressful for everyone involved," family friend Angela Fredericks said in a statement this week.
"No matter what happens, we know the power to release this family and bring them home to Biloela directly sits with the Minister and we continue to advocate for him to do so."
