King Charles greeted well-wishers with a wave as he departed from his London residence just a day after experiencing a health-related setback.

The 76-year-old British monarch was seen leaving Clarence House on March 28, following a brief hospital visit due to an adverse reaction to his routine cancer treatment.

King Charles III leaves Clarence House, The Mall, London, UK - 28 Mar 2025

On March 27, Buckingham Palace confirmed that King Charles was admitted to the London Clinic after experiencing “temporary side effects” that required short-term medical observation.

The King had been scheduled to visit Birmingham, England, for a series of engagements on March 28. However, these, along with meetings planned for March 27 with ambassadors, were postponed. The palace issued a statement expressing regret for any inconvenience caused and explained that, as a precaution and following medical advice, the King’s schedule for the following day would also be adjusted.

Photographers captured King Charles waving to the public outside Clarence House on March 28, 2025.

Royal sources emphasized that minor health setbacks are not unusual during treatment, with one insider describing this incident as “the most minor bump in the road,” reassuring that the King’s recovery remains on track.

King Charles III arrives for a visit to the 'Soil: The world at our feet' exhibition at Somerset House

Since announcing in February 2024 that he was undergoing treatment for an undisclosed form of cancer, King Charles has continued to fulfill royal duties. Following his hospital visit on March 27, he returned to Clarence House, where he resumed work by reviewing state papers and making calls, PEOPLE reports.

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The King’s most recent public appearance took place on March 26, 2025, when he attended an exhibition at Somerset House in London. While his upcoming schedule is being reviewed, palace aides confirmed that his planned trip to Italy with Queen Camilla, set to begin on April 7, remains on track.

King Charles III is driven by car from Clarence House, his London home, along The Mall towards Buckingham Palace

King Charles revealed his cancer diagnosis following a three-day hospital stay on February 6, 2024, after undergoing a procedure related to his prostate. The palace clarified that his illness is not prostate cancer.

At the time of his diagnosis, Buckingham Palace released a statement expressing the King’s gratitude for his medical team’s swift response, crediting his recent hospital treatment for enabling early intervention. The statement also noted that King Charles remains optimistic about his recovery and looks forward to resuming full public duties soon.

In sharing his diagnosis, the King aimed to prevent speculation and raise awareness for those affected by cancer worldwide, according to the palace.

One month after King Charles disclosed his illness, his daughter-in-law, Kate Middleton, revealed that she, too, had been diagnosed with cancer. The 43-year-old Princess of Wales later announced in January that she is now in remission.