"I found out that he wanted to play for Tonga from a third party. He never told me - I still haven't heard from him or spoken to him.
"I'm not going to have any ill-feeling towards Jason but if he explained things to me, I would have at least sat down and said, 'OK, what are your reasons?'.
"I would never step in someone's way of representing another country if that player doesn't feel connected to the New Zealand jumper.
Kidwell told the Courier Mail it remains unclear if Taumalolo has an issue with the current Kiwis set-up.
"I still don't know why he doesn't want to play for us," he said.
"If he has an issue with me, I'm not aware of it. I coached Jason when he was in the Junior Kiwis.
"If there is an issue, I just wanted him to see me and tell me how he was feeling. I'm an open book. I'm not closed. I'd like to think I have a mindset where I listen to people.
"It won't be up to me whether Jason plays for New Zealand again. It won't be the selectors either.
"It will be players. I'm trying to shape our culture at the moment and they are the ones driving it."
"I have 24 guys in this team now who feel they belong to the Kiwis and will play for the jumper. That's the attitude I want."