Wales, Ireland and the host nation are due to battle it out for the title on June 12.

The Welsh are the defending champions from 2019 as the event was called off last year due to the coronavirus pandemic.

"Seeing the Celtic Cup back on the international calendar is the boost our sport needed after 2020 was a washout," said Wales head coach Steve Jones.

"The Welsh team are looking forward to playing both Scotland and Ireland in June in what should be a superb competition. 

"With 2021 being a World Cup year it will give players a chance to show what they can do ahead of selection."

The World Cup is due to take place in England in November, so the Celtic Cup promises to be a crucial warm-up event for Wales and Scotland in addition to an opportunity to earn regional bragging rights.

Ireland did not qualify for the eight-team World Cup, but Wales and Scotland did and were both drawn in Group B alongside top-ranked France and the United States.

The Celtic Cup has been played four times since being established in 2016, with Wales winning each time.

"It is great to have the Wheelchair Rugby League Celtic Cup back in Scotland and we are looking forward to hosting Wales and Ireland in Edinburgh," added Scotland Rugby League operations director Ollie Cruickshank.

"We would like to thank International Rugby League for sanctioning the Celtic Cup for the first time in the tournament’s history. 

"It is great to see wheelchair rugby league getting recognised and this can only help with the visibility and development of the sport."

Competition is due to take place at the University of Edinburgh's Pleasance sports complex.