The advice means the French leader is set to miss the UN general assembly in New York on 14-16 September.
Mr Chirac left a Paris military hospital on Friday following a week’s treatment for eye trouble related to a “vascular” incident.
The statement also said that Mr Chirac had to “get as much rest as possible.”
Accompanied by his wife Bernadette, the 72-year-old walked unaided as he left Val-de-Grace military hospital and told reporters he was “in good form.”
“I am now going to go home and resume my activities. To hide nothing, I was starting to grow anxious to get out,” he added.