Hi, I have read posts from other forums and it gave me lots of information.Thanks to the contributors! My case is this, I had a cancelled Fiancee Visa Application for US 10 yrs ago (I honestly don't know if this was really cancelled by my ex fiancee..we broke up when I was about to have my embassy interview because he found someone else.)We lost contact and never heard anything from him. I am married now.My question is, would the circumstance affect my future application for Canada? 
