Regan Poole has linked up with Wales Under-21s ahead of their upcoming UEFA EURO Under-21 qualifier, while two more MK Dons man are set to join their respective national sides on Monday.
Poole has travelled to Cardiff to begin his week-long stay with Wales, who play Bosnia & Herzegovina in Zenica on Friday.
Meanwhile, Daniel Harvie and Warren O'Hora will meet up with Scotland Under-21s and Republic of Ireland Under-21s respectively on Monday.
Harvie is in the Scotland squad for their UEFA EURO Under-21 qualifier with Lithuania on Tuesday 8 September.
O'Hora was a late call-up for Republic of Ireland's six-day training camp in Belfast, which begins on Monday.
As a result of their selections, all three are set to miss Saturday's Carabao Cup tie with Coventry City at Stadium MK, while Harvie's absence will extend to the EFL Trophy tie with Northampton Town.