Bournemouth goalkeeper Mark Travers will return to his club after he picked up a minor strain and Blackburn Rovers defender Darragh Lenihan has also returned to his parent club following an injury assessment on his arrival.
Dunne and Talbot join the squad ahead of Thursday's training session as preparations for Saturday's FAI Centenary fixture against Belgium at the Aviva Stadium continue.
Republic of Ireland Squad - Belgium & Lithuania
Goalkeepers: Caoimhin Kelleher (Liverpool), Gavin Bazunu (Portsmouth, on loan from Manchester City), James Talbot (Bohemians).
Defenders: Seamus Coleman (Everton), Matt Doherty (Tottenham Hotspur), Ryan Manning (Swansea City), James McClean (Wigan Athletic), Shane Duffy (Brighton and Hove Albion), John Egan (Sheffield United), Nathan Collins (Burnley), Dara O'Shea (West Bromwich Albion), Jimmy Dunne (Queens Park Rangers).
Midfielders: Conor Hourihane (Sheffield United, on loan from Aston Villa), Josh Cullen (Anderlecht), Jeff Hendrick (QPR, on loan from Newcastle United), Jayson Molumby (West Bromwich Albion, on loan from Brighton and Hove Albion), Alan Browne (Preston North End), Jason Knight (Derby County), Mark Sykes (Oxford United).
Forwards: Callum Robinson (West Bromwich Albion), Troy Parrott (MK Dons, on loan from Tottenham Hotspur), Will Keane (Wigan Athletic), Scott Hogan (Birmingham City), Chiedozie Ogbene (Rotherham United), Connor Ronan (St. Mirren, on loan from Wolverhampton Wanderers).