What happens to my ED Visa if I leave Thailand before it expires and return later?

If you leave Thailand 3 weeks before your ED visa expires and return one week later, you will not be able to stay until the ED visa expires. Instead, upon re-entering Thailand, you will receive either a 30-day or 90-day visa exemption based on your nationality, regardless of the ED visa's original validity. This means you must check how long you will be allowed to stay under the new visa exemption conditions and plan accordingly.