Australia's Star Entertainment (SGR.AX) said it had received a notice from Hong Kong's Far East Consortium International (0035.HK) and Chow Tai Fook Enterprises to terminate the deal to sell its 50% stake in its Queen's Wharf project in Brisbane.
The termination is set to take effect five business days from June 30, unless withdrawn earlier.
Shares of Star were, however, up 1.7% at A$0.147, as of 0104 GMT.
The casino and hotel complex was developed for A$3.6 billion ($2.35 billion), Star's website says.
For years, Star and Blackstone-owned (BX.N) larger rival Crown Resorts have faced multiple inquiries into anti-money laundering rule violations and subsequent legal actions.
Had the deal gone through, Far East Consortium and Chow Tai Fook Enterprises were set to become the sole owner of the Brisbane venture, which has luxury hotels and restaurants and other amenities.
Star was, in turn, set to take on the investors' 66.67% stake in a Gold Coast project in Queensland.
In a separate statement, property developer Far East Consortium said that Star must repay A$10 million within 30 days of termination, failing which it must transfer its 33.3% stake in Tower 1 (Dorsett) to the Hong Kong parties.
"Despite the receipt of this notice, The Star remains willing to continue negotiations with the Joint Venture Partners to give effect to the DBC transaction," Star added.
Star Entertainment did not immediately respond to a Reuters email seeking confirmation of the repayment details.
($1 = 1.5314 Australian dollars)
