UN has no sanctions regime in place against Nicaragua.
The EU sanctions regime agains Nicaragua is based on "COUNCIL DECISION (CFSP) 2019/1720 of 14 October 2019 concerning restrictive measures in view of the situation in Nicaragua."
This is a list-based sanction regime consisting of the following restrictive measures:
Financial sanctions (asset freeze)
On November 27, 2018, the President of the United States issued E.O. 13851 rolling out the Nicaragua sanction program. This list-based program has bot travel ban and financial restrictions. The assets of those listed under this program with the tag of [NICARAGUA] on the SDN list should be blocked by U.S. persons. There are 37 of them as of April 12, 2020.
The US congress also passed a legislation called Nicaragua Human Rights and Anticorruption Act of 2018 which is designed to address the human rights and corruption concerns in Nicaragua. It requires the government to block the assets of certain persons. Such targets bear the tag of [NICARAGUA-NHRAA] next to their name on the SDN list. As of April 12, 2020, there are only 2 names on the SDN list with this tag. Additionally, the above-mentioned act requires the Secretary of the Treasury to instruct the United States Executive Director at some international organizations to use the voice, vote, and influence of the United States to oppose the extension of any loan or financial or technical assistance to the Government of Nicaragua for a project in Nicaragua.
The regulations related to this program is codified under 31 C.F.R. Part 582.