The trio have progressed through the Firhill ranks and been rewarded with two-year deals at the club.
Head of Youth Development Gerry Britton said: "I'm delighted the boys have signed. This is an exciting opportunity for both the boys and the club."
Meanwhile, the Jags have launched their Summer Soccer Camps, giving potential stars of the future the chance to learn from Thistle's top coaching team and meet a host of Firhill heroes.
The courses are for children aged 5-14 and will be held at the Firhill Complex from July 2-6 and 9-13.
General manager Ian Maxwell said: "The summer camps were a huge success last year and we hope that this summer's event will be even bigger and better.
"As always, space is limited so I would urge anyone interested to book their place before it is too late."
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