Officials said a further 22 troops were wounded, while 37 militants affiliated to the Islamic State group were killed.
The attack took place at Tessit, a town in the troubled region where the borders of Mali, Burkina Faso, and Niger converge.
It was one of the bloodiest to afflict Mali in a 10-year Islamist insurgency.
Thousands of residents have fled the area, adding to an estimated two million displaced by fighting in the wider Sahel region.
Watch Leakblast TV channel from around the world
SUPPORT LEAKBLAST JOURNALISM OF INTEGRITY AND CREDIBILITY
Good journalism costs a lot of money.
For continued free access to the best investigative journalism in the country we ask you to consider making a modest support to this noble Endeavor.
By contributing to LeakBlast, you are helping to sustain a journalism of relevance and ensuring it remains free and available to all.