Do I need to be in the US to attend training?

Short answer - NOPE! But....

You can sign up for courses with TTI even if you’re not based in the United States.

However, for EMDR training be sure to check if your country or geographic area has an EMDR governing body. There is EMDR Australia, EMDR UK, EMDR Europe and EMDR Asia. Check those sights as appropriate for information about training in your area.