Thailand is facing a suspension of the GSP by the US.
India could lose a zero tariffs on $5.6 billion of exports to the US.
The British Chamber of Commerce in Cambodia says the withdrawal of EBA risks making Cambodian factories commercially unviable.
Garment makers seek to allay fears Cambodia could lose trade preferences and tax breaks.
Garment Manufacturers Association of Cambodia expects the country can attract 100 new factories with tariff relief.