Kate, the Princess of Wales, canceled plans to attend the Royal Ascot horse race as she continues her recovery from cancer.

Catherine, Princess of Wales, was not at Royal Ascot on Wednesday, with a royal source citing her need for balance as she returns to public engagements after being treated for cancer last year.

The princess canceled plans to attend the British horse racing event Wednesday as she tries to find the “right balance” in her recovery from cancer, Kensington Palace said.