President of Ireland, Michael D Higgins, and his wife Sabina offered their “deepest condolences” to Nora’s parents, to her siblings and to her extended family.
The French Foreign Ministry also expressed its sincere condolences to Nora’s family.
The Quoirins had said Nora’s condition meant she was not independent and had difficulty walking.
Search crews looking for the teenager had played her mother’s voice in the dense Malaysian forest near where she disappeared.
Police had said Nora who was travelling on an Irish passport, was believed to have climbed out of her resort room window.
After Nora went missing, her family described how she was particularly vulnerable.
Describing her as a “very special person”, they said she would not have gone anywhere alone.