Yes it is definitely possible and can be done in many ways
Business rule - If you need to validate something and show an error message on a specific field
Create a business rule on that entity
Add a condition
Show error message based on the above condition
Real-Time Workflow –
Go to Solution--> Processes
Create a real-time workflow on that entity
Add a check condition
Stop Workflow with canceled --> Click on properties and enter your custom message in there
Web Resource - Custom logic using JavaScript
Plugin
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