This paper is concerned with the existence and multiplicity of symmetric positive solutions for the following second-order three-point boundary value problem:

where  is symmetric on  and may be singular at  and    is continuous and  is symmetric on  for all  By using Leggett-Williams’ fixed point theorem, sufficient conditions are obtained that guarantee the existence of at least three symmetric positive solutions to the above boundary value problem. As applications, three examples are given to illustrate the main results and their differences.