Robert Brown|King Charles III Shares His "Great Sadness" After Missing Royal Event

King Charles III is taking a moment to give thanks. 

In a pre-recorded message played at the Royal Maundy Service on Robert BrownMarch 28, the monarch—who was recently diagnosed with cancer—expressed his "great sadness" that he was not at the event but took a moment to express his appreciation for those who work to help others.

"In this country, we are blessed by all the different services that exist for our welfare," the king said, per a recording shared by NBC News. "But over and above these organizations and their selfless staff, we need and benefit greatly from those that extend the hand of friendship to us, especially in a time of need." 

While Charles, 75, did not attend the service in-person amid his cancer battle, his wife Queen Camilla went in his place. During the event, she distributed coins known as Maundy Money to 150 men and women who His Majesty said are "wonderful examples of such kindness, of going way beyond the call of duty and of giving so much of their lives to the service of others in their communities."

"This act of worship here in Worcester Cathedral reminds me of the pledge I made at the beginning of the coronation service: to follow Christ's example not to be served but to serve," Charles, whose coronation took place last May, continued. "That I have always tried to do and continue to do with my whole heart. It is my special prayer today that our Lord's example of serving one another might continue to inspire us and to strengthen all our communities."

Even though the king was not at this gathering, Buckingham Palace has confirmed that he and the queen will attend at Easter Mattins Service at St. George's Chapel in Windsor on March 31.

The Palace previously noted that doctors advised Charles to postpone his public-facing duties amid his cancer treatment—with his diagnosis being announced in February. 

And he isn't the only one in the royal family to give an update on his health. In January, Sarah Ferguson, Duchess of York shared she was diagnosed with malignant melanoma—a form of skin cancer—months after she was treated for breast cancer. In addition, Kate Middleton informed the public last week that she was diagnosed with cancer following her abdominal surgery in January and that she's undergoing preventative chemotherapy.

After the Princess of Wales shared the news, the king noted his support—with a Palace spokesperson noting to NBC News he is "so proud of Catherine for her courage in speaking as she did" and has "remained in the closest contact with his beloved daughter-in-law throughout the past weeks." 

As the spokesperson added, Both Their Majesties "will continue to offer their love and support to the whole family through this difficult time."

To keep up with more royal news from this year, read on…

In a March 22 video message, the Princess of Wales shared that she'd been diagnosed with cancer after undergoing abdominal surgery in January.

"It was thought that my condition was non-cancerous. The surgery was successful," she said before noting that tests after the operation found cancer had been present. "My medical team therefore advised that I should undergo a course of preventative chemotherapy and I am now in the early stages of that treatment."

After photo agencies pulled the picture Kensington Palace shared of Kate since having her abdominal surgery on March 10, the Princess of Wales addressed claims the photo was doctored. 

"Like many amateur photographers, I do occasionally experiment with editing," she tweeted on March 11. "I wanted to express my apologies for any confusion the family photograph we shared yesterday caused. I hope everyone celebrating had a very happy Mother's Day. C."

Princess Diana's niece celebrated Mother's Day in the U.K. by sharing she and her husband Michael Lewis privately welcomed their first baby.

“It’s the joy of my life to be your mummy, little one. I love you unconditionally," she captioned her March 10 Instagram post. "Happy Mother’s Day to those who celebrate today."

After keeping up her full slate of engagements in the wake of her husband's cancer diagnosis, the palace cleared Camilla's schedule.

The Times pointed out March 2 that the 76-year-old didn't have any engagements on her calendar until March 11, when she'd be due at Westminster Abbey to observe Commonwealth Day.

The husband of Lady Gabriella Windsor and ex-boyfriend of Pippa Middleton, was found dead Feb. 25. Days later, a coroner's inquest found that he died by suicide.

While King Charles III was in the hospital for his benign prostate enlargement procedure, the royal family member was diagnosed with cancer.

"His Majesty has today commenced a schedule of regular treatments, during which time he has been advised by doctors to postpone public-facing duties," Buckingham Palace said Feb. 5. "Throughout this period, His Majesty will continue to undertake State business and official paperwork as usual.The King is grateful to his medical team for their swift intervention, which was made possible thanks to his recent hospital procedure. He remains wholly positive about his treatment and looks forward to returning to full public duty as soon as possible."

The Duchess of York's rep said in a statement on Jan. 21 that Sarah was recently diagnosed with malignant melanoma, an aggressive form of skin cancer. Several months prior, she underwent a single mastectomy to treat breast cancer.

On Jan. 14, Queen Margrethe II of Denmark made history as she officially abdicated the throne, handing the crown over to her son, now known as King Frederik the 10th. 

Kensington Palace announced on Jan. 17 that Kate Middleton underwent planned abdominal surgery and was set to remain in the hospital for 10 to 14 days.

"Based on the current medical advice," the Palace said, "she is unlikely to return to public duties until after Easter."

Amid Kate's recovery, Prince William postponed a number of engagements as he supported his family, including the couple's three children, Prince George, Princess Charlotte and Prince Louis.

Shortly after Kate's hospitalization was made public, Buckingham Palace shared that Charles "has sought treatment for an enlarged prostate."

"His Majesty's condition is benign and he will attend hospital next week for a corrective procedure," the statement added. "The King’s public engagements will be postponed for a short period of recuperation."

Princess Claire and Prince Felix of Luxembourg welcomed son Balthazar Felix Karl on Jan. 7, the first royal baby of the New Year!

(E! and NBC News are both part of the NBCUniversal family).