In a video clip, obtained by BBCPanorama and supplied to CNN ahead of "The Missing Princess" documentary airing Tuesday night, Princess Latifa says: "I'm a hostage".
She is not allowed to go outside even for fresh air, she said.
Former President of Ireland Mary Robinson has claimed that she was "horribly tricked" over her dealings with Princess Latifa al Maktoum, a member of the ruling family of Dubai.
"I am a hostage and this villa has been converted into a jail", Latifa said in the video, "All the windows are barred shut, I can not open any window". "So basically, I'm a hostage".
Giving her reaction to the situation, Ms Robinson said: "I continue to be very anxious about Latifa".
The attorney for a daughter of Dubai's ruler urged the Gulf emirate to release the young woman from nearly three years of detention and avoid further global scandal after a videotaped plea for freedom spurred the UN's human rights body to seek information about her status. I am really reaching a point now where I'm just getting so exhausted of everything - I just want to be free'.
'The police threatened me that I'll be in prison my whole life and I'll never see the sun again.
The secretive ruler's family life was thrust into the news in 2019, when his estranged wife, Princess Haya, fled to London and sought custody of her two children through the British courts.
She told last night's Panorama that she didn't have any objection to the image being taken at the time as she meant to send it to the UN High Commissioner for Human Rights, Michelle Bachelet, for "proof of life".
'Haya began to explain that Latifa had quite a serious bipolar problem.
"That's something obviously that we are concerned about, that the UN Commissioner on Human Rights is looking at that and I think what we will do is wait and see how they get on".
Dr Robinson told the programme she did not ask Latifa about her situation because she did not want to "increase the trauma" of her "condition". The United Arab Emirates Embassy in Washington did not immediately respond to a request for comment.
Dr Robinson was the first female president of Ireland and is a former United Nations high commissioner for human rights. So I wasn't against the photograph. "I was absolutely stunned".
Nine days after the lunch, the UAE's foreign ministry published photographs of Ms Robinson with Latifa, which it said was proof the princess was safe and well.
She said she was aware a photo was being taken of the encounter, as proof that Latifa was alive, but was not aware it would be published. In April 2019, his former wife Princess Haya of Jordan left Sheikh Mohammed bin Rashid Al Maktoum accompanied by her two kids and moved to live in the United Kingdom, where she launched a number of legal actions against him, accusing him of mistreatment and of trying to marry off their 11-year old daughter Jalila to the Crown Prince of Saudi Arabia.