Theoretically, it can be done using a custom python job that will check the remaining time for SLA and, based on it, decide whether to send a notification or not. 

However, there's no such function out of the box. Therefore, I would recommend you open a Feature Request and, in the meantime, consider developing a custom job and using it as a workaround. 

This should definitely be a function of our product.  We need a feature request but would assume this is already in the works 

Hi @dnehoda,

Wondering if we have this solved or still in development? I am also looking for similar solution.

Thanks,