And this at a time when Iran and its allies are seen to have won the proxy war against Saudi-backed Sunni fighters in Syria.
Sunni-led Saudi Arabia, under Crown Prince Mohammed bin Salman, has been intensifying its confrontation with Shiite powerhouse Iran.
Saudi fingerprints were seen all over Hariri's resignation on Saturday.
Unexpectedly, Hariri appeared on Saudi-owned Al-Arabiya TV in a recorded video from an undisclosed location, haltingly delivering a statement in which he accused Iran of meddling in Arab affairs and the Iran-backed Hezbollah of holding Lebanon hostage.'Iran's arms in the region will be cut off,' he said, adding that he felt compelled to resign and that his life was endangered.
Hezbollah's leader, Hassan Nasrallah, on Sunday accused Saudi Arabia of drafting Hariri's resignation letter and forcing him to read it on Saudi TV.
The two camps support rival sides in countries across the region, worsening conflicts in Yemen, Syria and elsewhere.
Lebanon has been on the verge of blowing up into full scale violence, and only compromise by Lebanese parties has stopped it doing so in a country still haunted by memories from its own 1975-1990 civil war.
Iran and Saudi Arabia are locked in a power struggle for influence in Lebanon and France has close historical ties to the Middle Eastern country, which was once its colony.
President Macron said he had held informal contacts with Hariri, but there had been no request to transfer him to France.