Freya Ross has surrendered her place at the Commonwealth Games after suffering a hip injury.
The long-distance runner had been selected by Team Scotland last month, with the rest of the team to be named this week.
The 30-year-old was Britain's best performer in the marathon at London 2012 and her absence from Glasgow this summer follows the decision of compatriot Lee McConnell to retire earlier this year.
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"It is with regret and deep disappointment that I can confirm I have had to withdraw from Team Scotland for the Commonwealth games," said Ross. "I have suffered from a hip injury for the past few weeks and while the prognosis is good for a full return to competitive running, it is affecting my training.
"It is a difficult decision but one which has been taken in consultation with my coach, Steve Jones, scottishathletics, the sportscotland institute of sport support staff and Commonwealth Games Scotland. I would like to offer my support to every athlete in every sport involved for Glasgow 2014."