The warning comes at a turbulent time for the euro zone, with growing concerns about Greece and the possibility of a sovereign default, which would affect the region more broadly.
Like Greece, France's economy was hit hard by the financial crisis in the region, and it has since struggled to convince investors that an economic recovery is entrenched.
And despite posting surprisingly strong growth data for the first quarter of 2015 – when the economy expanded by 0.6 percent – unemployment in the country remains of serious concern.
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French President, Francois Hollande, has consistently promised to lower the unemployment rate, which was at 10.6 percent in March, according to Eurostat. Indeed, it is such a hot issue that Hollande has said he will not run for re-election in 2017 if he fails to create more jobs.
But the IMF said that without further structural reforms, the unemployment rate in France was "likely to decline only very slowly."
It added that the country's growth potential "still appears much weaker than before the crisis," and said that the current expansion was being supported by the accommodative external environment – such as lower oil prices, a weaker euro and low interest rates – rather than the domestic one.
"Investment has not yet responded, unemployment remains stubbornly high, and public debt continues to rise," the IMF said. "Moreover, the positive external impulses may dissipate soon while structural rigidities continue to weigh on France's growth potential."