Midfielders Craig Bryson (Derby County), Chris Burke (Birmingham City) and Kevin Thomson (Hibernian) were brought in after the withdrawal of West Bromwich Albion midfield duo James Morrison and Graham Dorrans on Sunday. Meanwhile, Strachan has also added Rangers defender Lee Wallace to his squad.
The Scots lie fifth in their group with five points from seven games but have no chance of competing in next year's World Cup in Brazil, with their last appearance at the finals stage of a major tournament coming at the 1998 FIFA World Cup France™.
Goalkeepers: Matt Gilks (Blackpool/ENG), David Marshall (Cardiff City/WAL), Allan McGregor (Hull City/ENG), Craig Samson (Kilmarnock).
Defenders: Ikechi Anya (Watford/ENG), Gordon Greer (Brighton and Hove Albion/ENG), Grant Hanley (Blackburn Rovers/ENG), Alan Hutton (Aston Villa/ENG), Russell Martin (Norwich City/ENG), Charlie Mulgrew (Celtic), Steven Whittaker (Norwich City/ENG), Lee Wallace (Rangers)
Midfielders: Charlie Adam (Stoke City/ENG), Barry Bannan (Aston Villa/ENG), George Boyd (Hull City/ENG), Scott Brown (Celtic), Craig Conway (Cardiff City/WAL), James Forrest (Celtic), James McArthur (Wigan Athletic/ENG), Steven Naismith (Everton/ENG), Robert Snodgrass (Norwich City/ENG), Craig Bryson (Derby County/ENG), Chris Burke (Birmingham City/ENG), Kevin Thomson (Hibernian)
Forwards: Leigh Griffiths (Wolverhampton Wanderers/ENG), Jamie Mackie (Nottingham Forest/ENG), Shaun Maloney (Wigan Athletic/ENG), Ross McCormack (Leeds United/ENG), Jordan Rhodes (Blackburn Rovers/ENG)