Electronic Journal of Differential Equations, Vol. 2011 (2011), No. 94, pp. 1-7. Title: Boundary-value problems for nonlinear third-order q-difference equations Author: Bashir Ahmad (King Abdulaziz Univ., Jeddah, Saudi Arabia) Abstract: This article shows existence results for a boundary-value problem of nonlinear third-order q-difference equations. Our results are based on Leray-Schauder degree theory and some standard fixed point theorems. Submitted December 2, 2010. Published July 28, 2011. Math Subject Classifications: 39A05, 39A13. Key Words: q-difference equations; boundary value problems; Leray-Schauder degree theory; fixed point theorems.