The singer stopped by 92.3 AMP Radio on Monday, when he was asked his opinion about Bieber's latest move.
"Obviously, you have to be in a good position mentally, but I also think, to a certain degree, when you're signing up to something, you should see it through," Tomlinson said.
Tomlinson could relate to having a hectic schedule as a member of One Direction, but he credited the fans with helping him get through those more tired moments.
"There is never enough that I can say or do for the fans. I think people can forget that, to be quite honest," he said. "At the end of the day, it's the people who are buying the records that are putting you where you are."
Bieber announced last Monday that he would cancel the remaining 14 cities left on his Purpose World Tour. TMZ reported that the reason being was that he was "just over it."
Bieber's team posted the following statement to his website later that afternoon:
"Due to unforeseen circumstances, Justin Bieber will cancel the remainder of the Purpose World Tour concerts. Justin loves his fans and hates to disappoint them. He thanks his fans for the incredible experience of the Purpose World Tour over last 18 months. He is grateful and honored to have shared that experience with his cast and crew for over 150 successful shows across 6 continents during this run. However, after careful consideration he has decided he will not be performing any further dates. Tickets will be refunded at point of purchase."