'Ridiculous'
Reacting to Saturday's court decision to throw out the vote, the head of the president's HVM party, Rivo Rakotovao, said: "Everyone must submit to the decision of the constitutional court."
In a comment issued just after the ruling, opposition spokesman Pierre Houleder called it "ridiculous".
The parliamentary opposition to President Rajaonarimampianina is led by former strongman Andry Rajoelina.
Correspondents say the president is being attacked by both Mr Rajoelina and another former president, Marc Ravalomanana - both of whom were forced to withdraw from the 2013 presidential election won by Mr Rajaonarimampianina.
Madagascar suffered years of political turmoil beginning in 2009, when Mr Rajoelina ousted Mr Ravalomanana.
The coup left the country isolated in the international community and deprived of foreign aid.