Is there any way to restrict/pop up an error message while submitting the performance doc

Summary:

Our requirement is to display error/warning message when line manager selects the overall summary rating or while submitting the performance document based on performance goals and competency rating(if it's low rating)

Content (please ensure you mask any confidential information):

We wanted to show a warning/error message when manager submits the performnce document for the below scenarios:

1. If any performance goal has less rating(For example: 1.Unaccepatable) then overall summary rating can't be "5-Outstanding" rating.
2. If any competency has less rating(For example: 1.Unaccepatable) then overall summary rating can't be "5-Outstanding" rating.

Our requirement is to display error/warning message when line manager selects the overall summary rating or while submitting the performance document based on above scenarios.