Can I create a custom condition that produces a warning messsage?

Is there a way to create a custom condition that produces a warning message but at the end of the form before the submit button? For example, we have a form that has the ability to enter info for 3 people on it. If they enter something for person 1 incorrectly can we then trigger the conditional response of you need to adjust this but have it show up by the submit button? The purpose would be that all error messages would populate in one area rather than having to scroll through the full form looking for the error. Which Jotform may not consider an error but rather just a condition that has been triggered due to the users choice.

I would suggest to create a custom warning using TEXT element, you can place it anywhere on your form:

Then, a condition can show this warning and also hide Submit button to prevent form submission if input does not meet your requirements: 

How-to-Show-or-Hide-Fields-Base-on-User-s-Answer

Hope this helps! But, please get back to us if you need further assistance.