The move comes as 10 Canadians continue to show unexplained brain symptoms.
The Canadians, including some minors, have suffered from dizziness, nausea and difficulty concentrating.
A report by a Canadian medical specialist says that a new type of brain injury may be the cause of a mysterious illness.
It has affected diplomatic staff and their families in Cuba.
Canada says it has discounted theories about covert sonic attacks being the cause of the illnesses.