Noof al-Maadeed, 23, was last heard of on October 13 when she spoke of receiving threats.
Since then fears have grown for her safety, with some reports last week suggesting she had been murdered.
Now a relative has come forward to say that Noof – who sought asylum in Britain after years of domestic abuse – is alive but is being kept heavily sedated and faces ‘imminent danger’.
Human rights campaigners are demanding that the Qatari authorities prove she is alive.
In her last social media post before she disappeared, Noof said: ‘If you do not see any posts from me in the coming days, that means I have been handed over to my family against my will.’