Paparazzi captured the former pair in action as they walked their dog together in a Miami park.
In the snaps, the 23-year-old Canadian was seen holding their golden retriever puppy, Tarzan, on a leash while Cabello walked next to them, clutching a bag in her right hand.
During the outing, the duo opted for a casual look in the fashion department. Cabello donned a short tan dress while Mendes sported a white T-shirt and a pair of blue jeans.
While sighting may raise some reconciliation rumors, the former couple made it clear that they planned to remain friends.
When Mendes and Cabello announced their breakup, they said they still had "love for one another as humans."
As Radar previously reported, after two years of being in a relationship, the Treat You Better crooner and former Fifth Harmony band member took to Instagram, revealing their decision to call it quits.
"Hey guys, we've decided to end our romantic relationship, but our love for one another as humans is stronger than ever," they wrote in a joint statement. "We started our relationship as best friends and will continue to be best friends. We so appreciate your support from the beginning and moving forward."
Following the breakup, Mendes opened up on social media to express his struggle to navigate his relationship with the platform.
"I'm having a little bit of hard time with social media at the moment, and just kind of my relationship with it," he explained. "But I have lots of people sending me videos and telling me what's going on."
Mendes' statement came after Cabello also informed her followers on Instagram that she was going to take a "lil social media detox" until the new year.
"Just wanna spend a little less time on my phone this week," she added.
Mendes and Cabello met in 2014, but they didn't start dating until July 2019. The In My Blood singer once claimed in an interview that Cabello was his "favorite person in the whole world."
"I don't think you'll ever meet somebody who can feel emotion like her, in all aspects," he shared. "She can feel hurt like no other, but she can feel love like no other."