Maybe.

The thing is, the country that doesn't stop ai development Will become the World leader in a few years/decades (depending on the starting position and resources....)

So I dont Think that any country Will stay out of the party. It might get regulated and controlled by goverments, and so, slow down, but AI Will keep going.

Anyway even uf they wanted it's imposible to stop without controlling computing power. In 20 years one Will probably be able to train a gpt-3 sized model in minutes in a personal computer