The presenter pointed out that Harry's comments came very soon after the death of Charles' father.
Campbell was shot down after responding to a tweet from Morgan criticising celebrities who promote Mental Health Awareness Week.
The former 'This Morning' host is open to offers from 'Good Morning Britain' to become its new co-anchor.
The 'GMB' presenter's husband returned to the family home last week after more than a year in hospital due to COVID.
A large black animal was spotted prowling on the banks of a lake behind Andi Peters on the ITV breakfast show.
The presenter clashed with Piers Morgan on the ITV programme over the latter's comments about the Duchess of Sussex.
The 53-year-old TV presenter said husband Derek Draper needs professional help and work keeps her going.