A spokeswoman for the National Museum of Natural History said two females and a baby were tracked down at around 4:15 am (0315 GMT).
The zoo is expected to reopen around noon.
"The professionalism of the wildlife teams at the Paris zoo allowed for a happy ending ... we are analysing the precise circumstances of the incident," the spokeswoman said.
The baboons remain in the area of the "grand rocher", a landmark central mountain inaccessible to the public at the zoo in the lush Vincennes area of the French capital.
Safety procedures were immediately triggered, the zoo said in a statement, with a total of 60 firefighters, 20 police and all of the zoo's staff mobilised to capture the animals.
None of the baboons reached public areas and the evacuation was ordered as a precaution, the zoo said.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.) Click for more trending news
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.