The debt isn't going to go away by itself. Even overlooking your leaving the jurisdiction, they're not subject to a statute of limitations. You are not able to file U.S. bankruptcy while living in a different country.

I don't know whether the creditors will attempt to pursue the debt through the courts of the country in which you presently reside. You can investigate whether your nation has laws that permit you to instruct collection agents not to contact you.

Your credit record is not part of your immigration record.