Malcolm O'Kelly was the biggest casualty when Ireland announced a reduced squad for their autumn schedule.
Leinster veteran O'Kelly, Ireland's most capped international, was one of seven players missing from the original 41-man party unveiled by head coach Declan Kidney last week.
Barry Murphy (Munster), Gavin Duffy (Connacht), Bob Casey (London Irish), Tom Court (Ulster), Michael Ross (Harlequins) and Roger Wilson (Northampton) were also omitted.
O'Kelly has been struggling with a neck injury recently but started last weekend's Magners League clash defeat by Glasgow.
Kidney names his starting line-up to face Canada at the redeveloped Thomond Park in Ireland's opening November international next Tuesday.
It will be Kidney's first match in charge since replacing Eddie O'Sullivan in the aftermath of this year's RBS 6 Nations.
Ireland face further Tests against New Zealand and Argentina this autumn, both at Croke Park.
Ireland's 34-man squad selected to reassemble for training in Dublin on Monday:
Tommy Bowe (Ospreys), Ian Dowling (Munster), Girvan Dempsey (Leinster), Keith Earls (Munster), Luke Fitzgerald (Leinster), Shane Horgan (Leinster), Robert Kearney (Leinster), Geordan Murphy (Leicester), Brian O'Driscoll (Leinster, captain), Ronan O'Gara (Munster), Tomas O'Leary (Munster), Eoin Reddan (Wasps), Jonathan Sexton (Leinster), Peter Stringer (Munster), Andrew Trimble (Ulster), Paddy Wallace (Ulster)
Rory Best (Ulster), Tony Buckley (Munster), Ryan Caldwell (Ulster), Stephen Ferris (Ulster), Jerry Flannery (Munster), John Hayes (Munster), Cian Healy (Leinster), Jamie Heaslip (Leinster), Marcus Horan (Munster), Bernard Jackman (Leinster), Shane Jennings (Leinster), Denis Leamy (Munster), Donncha O'Callaghan (Munster), Paul O'Connell (Munster), Mick O'Driscoll (Munster), Alan Quinlan (Munster), Donncha Ryan (Munster), David Wallace (Munster).