Opposition politicians said Tunisia's lowest ever turnout stripped away any facade of democratic legitimacy for Saied's political project and called directly for his ouster.
Saturday's dismal turnout strongly reinforced a perception of scant public support for his plans.
As a political independent, Saied lacks the nationwide support of a party apparatus that can mobilise on his behalf.
"Politics has become a luxury that we cannot afford," said Lamia Gharbi, who was queuing for bread at a Tunis bakery.
Successive coalition governments have failed to find a fix for public finances that can satisfy lenders without prompting a domestic backlash.