- The Constitutional Council is a member of the Union of Arab Constitutional Courts and Councils, and Pr. Issam Sleiman is a member of the executive bureau of the union.

- The Constitutional council is a founding member of the Association of the French speaking Constitutional courts (Association des Cours constitutionnelles francophones ACCF) https://accf-francophonie.org/cour/liban

- The Constitutional Council is a founding member of the World Conference on Constitutional Justice.

- The Constitutional Council collaborates with the Venice Commission, which is a consultative body of the European Council. The President of the Constitutional Council Dr. Issam Sleiman was invited by the Commission to take part in the ordinary session of March 2012 and gave an allocution on the Lebanese constitutional system.