Slater's comments is a continuation of war of words with Morrison over the government's decision to not allow players returning from the IPL to enter the country due to COVID-19 fears.
The BCCI is planning an airlift to Maldives or Sri Lanka for the stranded Australian cohort.
Reports said the 50-year-old former leg-spinner was allegedly abducted from near his home in Sydney on April 14 and taken to another part of the city where he was beaten and threatened with a gun.
The move is part of strict measures to stop travellers to Australia from the world's second-most populous nation as it contends with a surge in COVID-19 cases and deaths.
As many as 14 Australian cricketers are currently playing the IPL in India. They include top draws like David Warner, Steve Smith and Pat Cummins.
Australian umpire Paul Reiffel's attempts at leaving hit a dead end because of his country's suspension of air travel with India.
The 26-year-old, who found no buyers at the IPL auctions in February, expressed concern for his compatriots featuring in the ongoing lucrative league in India.
The spinner was part of the Royal Challengers Bangalore squad before he decided to leave India a few matches into the tournament.
"Be rest assured that the tournament is not over for BCCI till each one of you has reached your home, safe and sound," wrote BCCI COO Hemang Amin.
Chris Lynn, who plays for the Mumbai Indians in the IPL, had said that he asked Cricket Australia to arrange a chartered flight to bring Australians home at the conclusion of the tournament.