I stayed in dubai and i m overstayed for 3mnths

If you exceeded the residence at an earlier time, you will not be allowed to obtain a new visa until after the full amount of the fine has been paid, and then the visa application will be discussed and a new decision will be issued to accept or reject your application.
The fine is one hundred dirhams for each day
We note at last,
If you do not want to obtain a new visa, a request can be submitted to the General Administration of Residence in order to exempt you from paying half the fine for the period of stay in exchange for allowing you to leave and also to impose a ban against you for a year