EXCLUSIVE

Paris Jackson can't get a break ... her request to be transferred from UCLA Medical Center to a top out-of-state facility has been REJECTED, because the rehab place fears an onslaught of paparazzi.

Sources familiar with the situation tell TMZ ... UCLA docs will NOT let Paris return home, because they believe she is still a serious danger to herself -- they believe unless she gets more professional help she could end up killing herself.

We're told Paris' biological mom, Debbie Rowe, has researched adolescent facilities around the country and found one in Utah that would be perfect. But our sources say the facility has turned thumbs down on the request, because honchos at the rehab place fear photogs will go crazy and take pictures of not only Paris but other patients at the facility.

We're told Rowe is not satisfied with the other options, so the search continues ... although we're told people connected with Paris are contacting the facility and asking for reconsideration.

In the meantime, our sources say Paris is stuck at UCLA, and she's in the wing that treats patients with eating disorders -- a problem Paris does not have.