It's Saudi Arabia. Punctuality is not a traditional virtue of Saudis.
People in this country (as well as in India and other far- and middle-eastern cultures) have a more relaxed approach towards time. In these countries, keeping people waiting for appointments and allowing interruptions during meetings is common.
Doing so is not intended to be rude. Time is considered to be flexible and schedules are simply loose guidelines to work around.
A further aspect of this social practice is the fact that unless one has an appointment with a very important person, not coming to the meeting or social gathering or showing up late is received with much greater tolerance than it would be in other countries.
Arrangements, in fact, may change at any moment, without, in most cases, advanced notice, and definite commitments for the future are often considered much too restricting. See The problems of punctuality and productivity in Saudi Arabia to know more.
If you're planning a trip to Saudi Arabia, there are several important considerations to keep in mind. Follow these nine tips to help you have a successful visit, shared by YourAmazingPlaces.com.