The Court of Appeal ruled today that she remains in Syria with no chance of return to the UK.
Begum left her home in London when she was 15 to travel to Syria to join Islamic State group, and was later discovered by a Times journalist in a refugee camp.
Her UK citizenship was thus revoked.
She remains in a Kurdish-administered refugee camp in north-east Syria while her lawyers have fought a series of court battles since the revocation of citizenship.