C25K - do stops count?

Its really up to you. Personally I only treated a session as complete if I managed the running parts without walking. However, that's because for me it was huge motivation not to quit on a session - there was no way I was re-doing 18mins because I didn't manage the last 2mins. It made me push through which if I hadn't done it it would have made it easier for me to quit completely. The main thing is though enjoy the running! I now love running

Hi! I'll be doing wk 6 day 3 of C25k - this is when I'll try to run for 22 minutes without any stops.

If I stop to catch my breath for a few seconds but go ahead and complete the day (of course I will pause the timer when I stop) - should I mark that day as complete and try the next day? or re-do the day??

I wouldn't get too worked up about it, but you are training yourself to go further and further on each run. If you feel the need to pause then I'd suggest repeating the session, as much to prove it to yourself as anything else.

for what its worth now that I'm well beyond C25K when I'm out on a long run I will sometimes ease the pace down to a walk, generally as a means of shuffling kit around, taking a drink or even taking a photo. It's not an issue on a 15km run, so shouldn't be an issue for you.

Notwithstanding that, to train yourself, keep the pause as short as possible, keep moving forward.