Geoff Freeman, the association's president and chief executive, said perceptions that the US is unwelcoming and could potentially detain visitors were hampering sales.
"The US will be the only nation in the world this year to see a reduction in travel,” Freeman told the recent Phocuswright conference in San Diego.
"People are now thinking about coming to the US the way many of us thought about going to China – wiping devices, fearing detention. That’s really concerning."