Health minister Fahrettin Koca said on Thursday that the president’s health was fine and that he had “infectious gastroenteritis”. He said he would resume his scheduled daily programmes as soon as possible.
Latest polls suggest a close race for the presidency, with Mr Kilicdaroglu in with a good chance of electoral victory.
The first round takes place on 14 May, with a possible presidential run-off two weeks later.
President Erdogan initially cancelled three campaign appearances in central Anatolia on Wednesday, saying he had been advised to stay home on the advice of doctors.
Recep Tayyip Erdoğan has died aged 69
