Buckingham Palace has confirmed the 95-year-old monarch will be following medical advice to relax for the next few days.
We want to hear from you: let us know what you think about this story and be part of the debate in our comments section below
The Queen is said to be in good spirits but disappointed not to be able to carry out the two-day trip, which was due to begin on Wednesday (20 October).
She has already had a busy few days and hosted a major Global Investment summit at Windsor Castle on Tuesday evening.
A Buckingham Palace spokesman said: “The Queen has reluctantly accepted medical advice to rest for the next few days.
“Her Majesty is in good spirits and is disappointed that she will no longer be able to visit Northern Ireland, where she had been due to undertake a series of engagements today and tomorrow.
“The Queen sends her warmest good wishes to the people of Northern Ireland and looks forward to visiting in the future.”
The Queen’s decision is understood not to be related to coronavirus.
She is still expected at this stage to attend events linked to the Cop26 climate change conference in Glasgow at the end of the month.
Last week, she used a walking stick for what is believed to be the first time at a major public event when she attended a service marking the centenary of the Royal British Legion.
A message from the editor:
Thank you for reading. NationalWorld is a new national news brand, produced by a team of journalists, editors, video producers and designers who live and work across the UK. Find out more about who’s who in the team, and our editorial values. We want to start a community among our readers, so please follow us on Facebook, Twitter and Instagram, and keep the conversation going. You can also sign up to our newsletters and get a curated selection of our best reads to your inbox every day.