You can buy an ada compliant dishwasher like an Asko which should then fit...I had the same exact problem
How Do I Find A Built-in Dishwasher To Fit My 32 1/2 Inch Height Restriction To Fit Where My Old One Was?
If I'm not mistaken you only need about a half inch. This is probably due to a floor being installed too high. If this is the case you need to either remove the adjustable legs on the dishwasher or more likely remove some of the floor to install a new dishwasher. Keep this question open in case someone knows of a suitable dishwasher that can be installed without all the hassle.