05/10/2011 11:24 +0100 – Wigan midfielder McArthur has been called into the squad after Snodgrass pulled out with an ankle injury. Leeds winger Snodgrass missed training on Tuesday to receive treatment but Scotland assistant manager Peter Houston felt he would be fit for the qualifiers. However, the Scottish Football Association revealed on Wednesday morning that the former Livingston player was out. Snodgrass is the third player to pull out of the squad after Blackpool pair Stephen Crainey and Matt Gilks, who were replaced by Lee Wallace and Cammy Bell. But Scotland manager Craig Levein also has major doubts over key pair Kenny Miller and Darren Fletcher while Alan Hutton is also nursing an injury. Miller has a minor tear in his groin and is likely to miss Saturday's clash against Liechtenstein in Vaduz, but the Cardiff striker is hopeful of being fit to face Spain in Alicante on Tuesday. Fletcher, who played 90 minutes as Manchester United beat Norwich 2-0 on Saturday, did not join up with the squad after being struck down with tonsilitis and is not certain to travel on Thursday. Houston told several national newspapers on Tuesday: "Darren hasn't joined us yet because he has tonsilitis and we can't bring him into this environment. "We're not sure about the weekend. In terms of the second game against Spain, we are 100% hopeful Darren will make it. "Hopefully it clears up, but tonsilitis can lie in you for a number of days. "We don't want Darren up here to assess him because we can't bring him into an environment where it might spread. "It's got to the stage where Craig will be thinking maybe Darren is not going to be available for Saturday." Hutton also sat out training on Tuesday with a knee problem but Houston expected the Aston Villa full-back to be fit.