French President Francois Hollande will be joined at the commemorations by 20 foreign leaders.
The European Union is also understood to be sending 1,000 troops to support peacekeeping.
Reports of the president’s affair threaten to undermine his plans to revive a stalled economy.
French President Francois Hollande will make a state visit to the United States in February.
The series of Snowden-based leaks over the past three months have left Washington at odds with allies.
The strike is the latest blow to President Francois Hollande, whose popularity ratings are at record lows.