As reported by TASS, the ceremony was attended by the widow of the politician Martin Moiz and members of the republic's leadership.
Riots reportedly took place near the venue.
Law enforcement agencies sprayed tear gas, and shots were heard.
On the night of July 7, unknown assailants attacked the residence of Haitian President Jovenel Moise.
The head of state died from his injuries.
The president's wife was also injured.