John Fleck has tested positive for coronavirus at Scotland's pre-Euro 2020 training camp in Alicante.
The Sheffield United midfielder will self-isolate in La Finca, where the Scotland squad have spent the last four days, and will not travel with the rest of his team-mates for Wednesday's friendly against the Netherlands in Portugal.
Scotland also face Luxembourg in a friendly on Sunday before their Euro 2020 opener against the Czech Republic in Glasgow on June 14.
The rest of the squad were tested on Tuesday following five-cap Fleck's positive result and all returned negative tests.
Scotland boss Steve Clarke said: "He has no symptoms. Obviously, he's got to isolate for a few days so we'll keep an eye on him and look after him like we do everybody. So hopefully it stops there.
"We're looking at the information we’ve got and relying on the doctors and the medical opinions and we’re 90 per cent sure that John brought it into the camp.
"It's one of those things. We know the state of the world at the moment with the pandemic. We just have to deal with it, as other countries might have to deal with it as well."
Scotland, who are preparing for their first major tournament in 23 years, also face England and Croatia in Group D.