The Duchess of Sussex was due to make a joint speech with the Duke of Sussex in Brussels about online child safety on Tuesday.
Harry and Meghan had both been set to deliver the keynote address to the European parliament.
However, Sky News understands Meghan does not feel emotionally strong enough right now to do any public speaking.
The duchess will still join Harry at the event, but has decided not to speak after Thomas Markle Sr appeared in court on Friday, charged with possession of child abuse material.
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