People arriving in Scotland from Luxembourg will have to self-isolate for 14 days following a rise in Covid-19 cases in the European country.
The Scottish Government announced the measures will come into force from midnight on Friday.
It follows a similar decision about Spain on July 25.
Justice secretary Humza Yousaf said: “This decision is based on the latest available data from the Joint Biosecurity Centre and it gives another clear indication that the virus is active and still spreading.
“We have always maintained that we are closely monitoring the pandemic situation in all countries and we will impose quarantine requirements as necessary in a bid to protect the public.
“This virus is showing a resurgence in areas and it should not be forgotten how deadly it remains.
“Our priority to is suppress the virus, prevent it from being transmitted and protecting public health.”