Postponing or forgoing adjuvant chemo (for colorectal)

I just got a message from my parents who met with the oncologist today. My dad was supposed to start adjuvant chemo a couple months after surgery (ended up being in September, changed surgeons), but he had some problems after surgery and was asked to follow up in November. When that week in November came, my dad came down with a bad fever as a result of a kidney infection and then peritonitis.

By the time he left the hospital (he was in for 13 days, and that was about 2 weeks ago), his kidney levels were normal, but his bloodwork shows it's gotten worse again. His oncologist is setting up a meeting with other oncologists as well as his surgeon to see if it's safe for him to have chemo, considering his bowel wall is still healing both from resection and the rupture and his serum creatinine levels (I think that's what it's called? In his last bloodwork, I'm told it was 195) are elevated again.

Without adjuvant chemo, there's a 30% risk of recurrence... but considering the hell he went through post-surgery, quite honestly the worst I have ever seen him, the last thing I want to do is compromise his health and healing. At the same time, the back of my mind is saying to me "do you want to wait and see, and then have him end up on palliative chemo someday soon?"

They'll be meeting with the oncologist again next Tuesday. As far as I know, adjuvant chemo is just par for the course for colorectal. I've asked my parents to ask the oncologist if it's possible or worthwhile to do things a bit out of order, like stoma takedown surgery in 12 weeks (when the surgeon said it would be appropriate, and the thing my parents are looking forward to) and then do chemo after his recovery from that... maybe in 5-6 months?

Has anyone else postponed their adjuvant chemo, or forgone it altogether? If so, did your oncologist think it would have a big impact on your overall prognosis?