Official figures reveal only 84 per cent children and young people are being treated for mental health problems within 18 weeks when the SNP’s own benchmark is 90 per cent.
And during the quarter ending March 2016, the 18 week standard was met by only eight out of 14 health boards.
The worst performing health board was NHS Forth Valley at just 44.2 per cent, closely followed by NHS Grampian at 49.1 per cent.
NHS Fife along with Borders, Shetland and Lothian also failed to see young people within the 18-week benchmark period.
This could mean that children and young people have to wait more than six months to receive treatment from specialist child and adolescent mental health service.
The Scottish Conservatives previously highlighted this problem and have been calling for a 10 year mental health strategy.
Scottish Conservative mental health spokesman Miles Briggs said:
“We’ve previously highlighted this issue and this is yet another warning to the Scottish Government.
“The SNP are simply failing our young people with mental health problems and no amount of spin will dress these figures up.
“Children, young people and their parents deserve much better than this. It is important people with mental health problems are seen quickly for diagnosis and treatment to stop illnesses developing into more in the future.
“Adequate resources should have been put in place long before now and obviously they are struggling within the 18 week target.
“Mental health is one area where we have genuine political consensus and I am determined to press the Scottish Government to be imaginative and take a cross portfolio approach to the issue .
“It is perhaps the most stark statistic that suicide is still the biggest killer of young people under 35 in Scotland – we have an real opportunity to get this right and truly improve mental health services.”