he [would be unlikely to]/[wouldn't] join us when

[EngLearner]

John, Peter, Rick, and some other colleagues from the office had agreed in person to meet at 4:00 pm to discuss business matters. However, John sent everyone an email informing them that he had rescheduled the meeting to 3:00 pm. Peter, who hadn't received John's email, informed Rick that he had to leave but assured him he would be back in time for the meeting at 4:00 pm. Rick then informed Peter that the meeting had been rescheduled and that he should return before 3:00 pm. Later, during lunch, Rick spoke with John and, among other things, mentioned:

Peter didn't receive your email. He didn't know that the meeting had been rescheduled. If I hadn't told him, he [would be unlikely to]/[wouldn't] join us when it starts at 3:00 pm.

Can either option be used in the mixed conditional that I wrote? I also wonder if the blue tenses "hadn't told" and "starts" work in this context.

 

[emsr2d2]

If I hadn't told him, he wouldn't have been able to join us at 3pm.
If I hadn't told him, he wouldn't be joining us at 3pm.

 

[güey]

If I hadn't told him, he wouldn't have been able to join us at 3pm.

Would this option be more, or less possible?

If I hadn't told him, he wouldn't be able to join us at 3pm.

 

[emsr2d2]

Would this option be more, or less possible?

If I hadn't told him, he wouldn't be able to join us at 3pm.

There's no such thing as "more or less possible". Something's either possible or it's not.

Your sentence is OK.

 

[tedmc]

I think emsr2d2's first version using the third conditional is more natural for an action that didn't happen.