Car seat advice

Hello, I have a 5 year old, 3 year old, and one on the way. We won’t be able to get a new car right away. Maybe not for a year. But I was wondering if there was any way to fit three car seats into one row. My 5 year old can fit into a small booster, my three year old is a little bulky, and I would have a new born car seat. Is there any way to fit all three into my Nissan rouge 2017.