The Kuwaiti News Agency said Kuwaiti emir, Sheikh Jaber al-Ahmad al-Sabah, and Crown Prince Saad al-Abullah al-Sabah, will not attend the summit Monday and Tuesday.
Both are known to be ailing and have not attended any Arab meeting in several years.
In Oman, the official news agency said Sultan Qaboos bin Said will not participate in the summit. His country will be represented by Deputy Prime Minister Sayyed Fahd bin Mahmoud al-Said.
Saudi Crown Prince Abdullah and Bahrain's King Hamad bin Issa al-Khalifa also said they will not attend the summit.