The Bucharest court of appeal this week ruled in separate cases that the seven should be prohibited from returning to the country for between three to seven years, Romania's interior intelligence agency SRI said in a statement.
Six of the foreigners made up a group "affiliated to radical ideologies of the Al-Qaeda and Islamic State terrorist groups" and carried out "Islamic extremist propaganda... (and) recruitment for religious and military training in conflict zones affected by terrorism," the statement said.
Hundreds of foreign fighters, many of them from Europe, have joined the IS jihadist group that has grabbed control of large swathes of war-torn Syria and Iraq.