A landlord gives a notice for eviction 3 weeks after the due date. Is it effective?

Hello,

I am living in a flat in Dubai. The contract states that the owner should give me a 90-day notice if he wants to take the flat.

However, the real estate agent called me three weeks after the due date and told me that the owner wants to take possession of the flat to live in it.

I am not very familiar with the laws here, but can I force the owner to renew the contract as he contacted me three weeks after the due date? Or does he have the right to invoke this reason whenever he pleases, thus bypassing the 90-day notice?

How can I verify that the landlord really wants to live in the flat? Because once I leave, he could rent it again without my knowledge.

Thank you for your responses!