What are current immigration restrictions enacted the current Trump administration?

It is important to first point out that the current immigration restrictions that were enacted by the Trump administration October 8, 2017 are condition based, not time-based, meaning countries can be removed from or added to the restricted countries list on a rolling basis. The head of the Department of Homeland Security submits a report to the President every 180 days with recommendations, updates and current status of each country. The current restrictions include: travel to the US is banned for all citizens of Iran, Chad, North Korea, Somalia, Yemen, and Syria. However, the restrictions are varied and based on country of citizenship. For the countries listed above are immigrant visas have been suspended. Non-immigrant visas for business and tourism have been suspended for all nationalists of Libya, Chad, North Korea, Yemen, and Syria. Iranian citizens are not eligible for business or tourism visas but are eligible for student and cultural exchange visas with increased security checks. Somalia citizens can apply for non-immigrant visas but with more security checks. Venezuela, North Korea, Iraq, and Chad citizens now have additional restrictions and increased vetting, they can apply for visas but now require case-by-case waivers.

Chad: Entry into the US for immigrants and non-immigrants on business, tourists, and business-tourists visas are suspended.

Iran: Entry into the US for immigrants and non-immigrants is suspended, except for student and cultural exchange visitor visas.

Yemen: Entry into the US for immigrants and non-immigrants on business, tourists, and business-tourists visas are suspended.

Syria: Entry into the US for immigrants and non-immigrants is suspended.

Venezuela: Only certain Venezuelan government officials and their immediate familiy members are allowed entry into the US as non-immigrants on business.

Somalia: Entry into the US for immigrants is suspended. Non-immigrants traveling to the US will endure enhanced screening and vetting.

North Korea: Entry into the US for immigrants and non-immigrants is suspended.

Libya: Entry into the US for immigrants and non-immigrants on business, tourists, and business-tourists visas are suspended.