The Ministry of Health said today the three deceased were among 38 infected in the kingdom with the respiratory virus called MERS.
It says two of the three whose deaths were reported today were suffering from chronic diseases.
The World Health Organization said the new germ was first seen in the Middle East and that it had killed about 800 people in a global epidemic in 2003.
The WHO said yesterday prior to the latest Saudi announcement that it had been informed of 51 confirmed cases of the new virus since September and 30 of those cases were fatal.