Presidential contenders liberal Amr Moussa and leftist Hisham El-Bastawisi met with Saudi Arabian ambassador in Cairo, Ahmed El-Qattan two days before polling for the presidential elections are scheduled to open on Wednesday.
Early Monday, presidential candidate former Mubarak regime prime minister Ahmed Shafiq also visited El-Qattan at the embassy.
This comes following visits by other candidate, Islamist Mohamed Selim El-Awa, Muslim Brotherhood candidate Mohamed Morsi and liberal ex-Muslim Brotherhood member, now backed by Salafists Abdel-Moneim Abul-Fotouh.
Such visits come at a time when Egyptian lawyer Ahmed El-Gizawi is under arrest in Saudi Arabia, undergoing investigations after being arrested on 23 April for the illegal smuggling of anti-depressant drugs.
Tensions between Egypt and Saudi Arabia escalated following the arrest when several activists staged a sit-in outside the embassy headquarters prompting Saudi Arabia to temporarily recall its ambassador and close the embassy in late April.
Egypt's first post-Mubarak presidential poll will be held on 23 and 24 May, with a runoff round on 16 and 17 June if no single candidate wins an outright majority. Egypt's next president will be formally named on 21 June.