I made custom validation method for this. Here it is
$.validator.addMethod("maxFilesToSelect", function(value, element, params) { var fileCount = element.files.length; if(fileCount>2fileCount > params){ return false; } else{ return true; } }, 'Select no more than 2 files'); And specify rule as
policyBriefFiles: { extension:'xlsx,pdf', filesize: 2097152, maxFilesToSelect : 2, }, Working as charm :-)