Prince Harry is set to return to the U.K. after he officially finishes his royal engagements with Meghan Markle and leaves the monarchy next month. However, he may do it alone when he makes a comeback as the patron of the London Marathon in April after assumptions emerge that his wife may never return to Britain.

Royal commentator Lizzie Robinson believes the Duchess of Sussex will only finish the remaining royal engagements she has to do before they officially step down as senior members of the royal family. Hence, she may never return to the U.K. for other commitments, even if it involves her husband.

While talking on ITV's Royal Rota, editor Chris Ship revealed Prince Harry and Meghan Markle have to return to the U.K. in April because of the London Marathon, per Express. However, royal producer Lizzie Robinson quickly intervened and said that the sixth in line to the throne "might be back on his own."

"We might see him in April as patron of the London Marathon," Ship said. "And they're both going to the Invictus Games in The Hague in May."

Prince Harry and Meghan Markle have to complete their royal duties before they officially leave the U.K. After they finish all their royal engagements, the change in their royal status and living arrangements will take effect on March 31.

The royal couple's spokeswoman revealed they are set to return to the U.K. later this month to perform their remaining royal duties. After that, their Buckingham Palace office will be closed, and they will only be represented through their U.K. charity, Business Times noted.

Prince Harry and Meghan Markle have to take part in, at least, six official engagements. From Feb. 28 to March 5, Prince William's brother has to attend different events, including visiting a recording session of Jon Bon Jovi and the Invictus Games Choir.

Meghan Markle will then join Prince Harry at the Royal Albert Hall for the celebration of the International Women's Day on March 8. Their last and final engagement will be the Commonwealth Service at Westminster Abbey, where they will join Queen Elizabeth II and the rest of the royal family on March 9.

After these engagements, Prince Harry and Meghan Markle will work on their non-profit organization, which details will be announced later this year. They will also continue working on their existing patronages as they are still planning to do their works in the U.K. and the Commonwealth throughout 2020 despite their HRH titles' removal.