This sudden development comes after Catherine had begun to make more frequent appearances in public since announcing her remission status in January. However, her absence from this high-profile event, which is traditionally well-attended by members of the royal family, has sparked concerns over her health and recovery journey.

A spokesperson from the palace expressed that Catherine is disappointed not to join Prince William, who will represent the royal family at the races. Despite her reduced engagement schedule compared to pre-illness times, Catherine recently participated in the Trooping the Colour ceremony honoring King Charles III's birthday.

As the royal family continues to engage with the public, Catherine's health remains a topic of interest and concern. Further updates are awaited on her journey to recovery.