Duchess Sophie jetted out of the UK on Monday after she was assigned a major task by Buckingham Palace.
The engagement in Scotland comes at a crucial time as King Charles finally closed an exhausting chapter with his brother, Andrew, and the allegations that have been plaguing the royal family since the past few months.
It was confirmed in the Royal Diary that the Duchess of Edinburgh, in her role as patron of the Defence Medical Welfare Service, will attend a reception at Edinburgh Castle.

The independent charity provides medical welfare to those who are serving or have served on the frontline, including the armed forces, the Merchant Navy, the NHS and the Police.
Sophie has been the royal patron of the welfare organisation since 2016 in which she will be strengthening her uniquely important role with the charity and its contribution to the society.
In her first visit, when Sophie was Countess of Wessex, she met service users and staff over afternoon tea, and also studied three storyboards depicting real DMWS cases. The cases gave insight into the vast diversity of the support DMWS offers to patients and their families, according to a Palace report.
It is anticipated that Sophie will receive an update on the work the charity has been doing and will learn more extensively about the different stories that have come up.
Sophie’s presence at the event will further the message of compassion that the royal family has been trying to send as there was immense criticism about Andrew’s statement.
When the former Duke of York relinquished the use of his royal titles last month, the public noted that there was no expression of contrition and sympathy for the victims and it only dripped of the shamed royal’s arrogance.
As The King stripped the ‘prince’ title and style from his brother along with an eviction notice for Royal Lodge, Charles and Camilla seemed to have acknowledged the pain of the abuse survivors without making any accusations towards Andrew.
“Their Majesties wish to make clear that their thoughts and utmost sympathies have been, and will remain with, the victims and survivors of any and all forms of abuse,” the statement from the monarch’s office read.
Royal expert Jennie Bond had commented the royals wanted to show sympathy for the victims especially since as Camilla and Duchess Sophie have worked with victims of abuse.