I got this response from CS as one property in Africa wouldn't even let me pay to have my under 12 kid in... Too k 4 calls to property and 7 emails to get it sorted... Uktimately for free
Thank you for taking the time to reach out to Marriott Customer Care today.
"Most hotels outside of the United States and Canada limit adult occupancies to two people. This is why you see this. Your children will be welcome to stay with you but use only 2 people when booking.
Safe travels,"