Baku, May 7, AZERTAC

Harry is in London to mark the 10th anniversary of the Invictus Games.

Prince Harry, the Duke of Sussex, will not see his father King Charles III while he is in London to mark the 10th anniversary of the Invictus Games, ABC News has confirmed.

A spokesperson for the duke told ABC News on Tuesday that Charles' schedule does not allow time for him to see his younger son, who now lives in the United States.

"It unfortunately will not be possible due to His Majesty's full programme," the spokesperson said of a meeting between Harry and Charles. "The Duke of course is understanding of his father's diary of commitments and various other priorities and hopes to see him soon."

The last time Harry and Charles saw each other was in February, when Harry flew to London to visit Charles after the palace publicly shared that Charles had been diagnosed with an undisclosed type of cancer.

Harry reportedly met with Charles, who has since begun cancer treatment, for less than an hour on Feb. 6, and stayed overnight in a hotel before departing the next day from London's Heathrow Airport.

In an interview with ABC News' Will Reeve just after his visit, Harry said he hoped to see Charles again soon, saying, "I've got other trips planned that will take me through the U.K., or back to the U.K., and so I'll stop in and see my family as much as I can.”

While visiting with Charles, Harry did not see his older brother Prince William. It is not known whether the brothers, who have a strained relationship, will see each other while Harry is in London this week.

A spokesperson for both Buckingham and Kensington Palaces declined to comment to ABC News.

Prior to February, Harry had not seen his 75-year-old father since the king's coronation last May at Westminster Abbey.

As he did in both February and May, Harry traveled to London this week solo, visiting his hometown without his wife Meghan, the Duchess of Sussex, or their two children Archie and Lilibet.

Harry is scheduled to attend a service of Thanksgiving at St. Paul's Cathedral on May 8 to mark the 10th anniversary of the Invictus Games, a Paralympic-style competition for wounded service members that he founded in 2014.

Harry launched the first Invictus Games in 2014 in London as an international version of the Warrior Games, an annual event organized by the U.S. Department of Defense, which the prince attended in 2013.

The games have since taken place in Orlando, Toronto, Sydney, Düsseldorf and The Hague.

Following his visit to London, Harry will travel to Nigeria, where he will be joined by Meghan.

The Sussexes are visiting the African country on invitation from the country's highest-ranking military official, its Chief of Defense Staff.