This is also known as the UN clause and it is usually required in the lease agreement by multinational companies who may transfer their employees anytime from country to country. It should go something like this:

“Should the Lessee be compelled to leave Bangkok due to unforeseen circumstances beyond the control of the Lessee i.e. overseas job transfer, the lease may be terminated after completing a minimum stay of (6 – 10) months on the premise, by giving 60 days advance notice in writing with supported company documents, and the deposit paid in advance shall be returned. “

Different apartments have varying policies regarding the diplomatic clause and will require a minimum stay, ranging from 6 – 10 months in order for this clause to be applied. Same for condos and houses.