Pass argument onto next filter and ignore it

Is there a way to pass an argument onto the next filter on a certain condition (e.g. if the validation fails on the first filter)?

As an example, I have two filters - the first takes a day, the second takes a letter. If the url is just "example.com/b", is there a way for the first filter to just ignore it and display all, and then have the second filter use that value?

I have been searching for this and can't seem to find it anywhere, so I assume it is a feature request. Sorry if it's not.