Is diarrhea common in the third trimester?

I’d contact your doctor. It can be perfectly normal hormones etc. it can indicate the start of labor or a tummy bug. But as you have had it for a few days now, it’s best to get it checked out. Make sure to drink plenty of water, and eat things like bananas if you can.

How many weeks are you? Are you due soon? Yes it can be normal! My signs when I first found out I was pregnant was diarrhoea then at the end the same as it’s clearing your body out to make way for baby, how fun 😅

I had a similar thing happen for about a week before I gave birth

It can be your body's way of telling you something but it can also be a tummy bug. I'd contact the midwife and get them to check on baby.

I had sickness and diarrhoea for 5 days ended up calling the hospital and my little boy was born 3 hours later via csection at 33+5

I had loose stools / almost like diarrhoea every single day once a day from 32 weeks pregnant until around 1 week postpartum!