Effective October 18, 2017, the following countries are subject to restricted travel to the United States based on the recent presidential proclamation: Chad, Iran, Libya, North Korea, Syria, Venezuela, Yemen, and Somalia.
Restrictions on travel vary from country to country, and specific information about the restrictions placed on each individual country can be found here: https://www.whitehouse.gov/the-press-office/2017/09/24/enhancing-vetting-capabilities-and-processes-detecting-attempted-entry.
Entry into the United States by nationals of North Korean and Syrian nationality are suspended for both immigrants and nonimmigrants. Citizens of Chad, Libya, and Yemen will not be allowed to enter the United States for immigrant purposes or on B2 (B-1), tourist (B-2), and business/tourist (B-1/B-2) visas.
Travel by citizens of Somalia as immigrants is suspended. Travel by citizens of Iran is permitted only for visa holders in the following categories: F, M, and J.
Citizens of Venezuela who are officials of certain government agencies, and their immediate relatives, will not be permitted to enter the United States as nonimmigrants on business (B-1), tourist (B-2), and business/tourist (B-1/B-2).
Several countries will be subject to additional screening and vetting procedures.
Exceptions exist that will allow individuals from the eight designated countries to be granted entry into the United States, including for those who are lawful permanent residents of the United States, foreign nationals who have a travel document other than a visa, and any dual national who is traveling on a passport for a non-designated country.
This blog post does not constitute legal advice and should not be used in place of a consultation with an attorney.