In a filing to the Nasdaq exchange on Jan 21, Entertainment Gaming Asia (EGA) said it was considering pulling out its investment from Pailin, the Phnom Penh Post reported.
The firm, which operates Dreamworld Pailin, said it would either write off its initial US$2.5 million (80 million baht) or consider other options, including subletting its premises.
Pailin is opposite Pong Nam Ron district in Chanthaburi province.
EGA said in the filing that it is struggling to entice Thais to cross the border, the newspaper added.
EGA, which is owned by Melco International Development, runs another casino in Poipet town in Banteay Meanchey province. Poipet is opposite Aranyaprathet district in Sa Kaeo province.
The casino in Pailin, the former Khmer Rouge stronghold, had been operational since May 2012.