Many states also have laws similiar to the ADA, so the OP needs to determine which jurisdiction applies, and see if there is a rule in that jurisdiction, which

Many states also have laws similiar to the ADA, so the OP needs to determine which jurisdiction applies, and see if there is a rule in that jurisdiction, which may not exclude foreigners. In addition, OP will need to be able to prove that they were fired because of their disability. OP should keep copies of any communication or other evidence they have, and contact a lawyer ASAP if they wish to pursue this.