Shamima Begum was one of three east London schoolgirls who traveled to Syria in 2015. She said she married an IS member from the Netherlands and had three children, all of whom have died.
Begum has sought to return home, but the British government revoked her citizenship on national security grounds.
The 22-year-old says she regrets every decision she made since she stepped into Syria and will “live with it for the rest of my life.”
Begum said she was willing to face terrorism charges in Britain and would prove her innocence in court.
Health Secretary Sajid Javid said the decision was both legal and “morally right” and said she had been misled into thinking she was going to Syria to live in an “Islamic community.”
She said the only crime she committed was being “dumb enough to join ISIS.”