Included in the squad are a number of senior fringe players such as James McCarthy, Anthony Stokes and Seamus Coleman while Cillian Sheridan will transfer to the Senior Ireland squad after the match. Under 19 stars, Aaron Doran, Conor Hourihane, Rob Kiernan and Joe Mason have been called into this age category for the first time.
Republic of Ireland head coach, Noel King said, "I am really looking forward to the upcoming UEFA Championship qualifier against Estonia who will be a tough outfit to beat following some significant results in the campaign to date, most recently, their victory against second placed Turkey last May."
"I am very satisfied with the quality of the players who I have been able to call-up to the squad for this important qualifying game as I think that it is of upmost importance for the players to get some positive results for the team before the end of this campaign."
"Included in the squad are a core group of talented players who have the experience of playing at this level while we have also drafted in a number of very capable young players which I believe will give us a good balance between being competitive in this fixture while also giving some of our younger players the experience that they need at this level."
Under 21 Squad v Estonia
Stephen Henderson - Bristol City
Shane Redmond - Chesterfield
Seamus Coleman - Everton
Lanre Oyebanjo - Histon
Brendan Moloney - Nottingham Forest
Eddie Nolan - Scunthorpe United
Gavin Gunning - Blackburn Rovers
Rob Kiernan - Watford
Owen Garvan - Ipswich Town
Conor Clifford - Chelsea
Alan Judge - Blackburn Rovers
Stephen Gleeson - MK Dons
James McCarthy - Wigan Athletic
Conor Hourihane - Ipswich Town
Cillian Sheridan - Celtic
Anthony Stokes - Hibernian
Aaron Doran - Blackburn Rovers
Joe Mason - Plymouth Argyle