Hello,
How your validations are showing using rules or code? Do you have any code for Submit button then you have to get those error nodes in code. Using the below code you will get all errors in your form,
var errors = XDocument.Errors;
From this list you can prepare the node list which have the validation and give the alert message to user.
One more option is user will get those validation field names using Tools -> Go to Next Error. It will give the list of fields have validation in your form.