Leclerc sat in the Scuderia garage as times tumbled at the end of Q1 and he was ultimately eliminated by team-mate Sebastian Vettel, himself scrambling through after an error early in the session.
Starting 15th on the grid, Leclerc pulled off some impressive early overtakes, but came a cropper when trying to pass Nico Hulkenberg at La Rascasse, extending his run of home-race DNFs to four from as many outings.
Hamilton took pole in Monaco and said of Ferrari's quali error: "Sometimes it happens, y'know? They'll have a minimum time, the knock-out time.
"They'll say the least time is this, and they'll predict that the track is going to improve a certain amount.
"You go out, you do a lap, and they say you're safe. My first lap, they said I was safe – but I could stay out and do more. I decided to stay out and better my time and see the track improve.
"I've, in the past, been sat in the garage and they're like: 'we're on the edge, we might go out again, we might not.' They [Ferrari] chose to risk it. We don't really take many risks like that."
Discussing how Mercedes avoid similar situations occurring, Hamilton said: "The communication is constant. That relationship is so, so important.
"We've got great, great people within our team that are just not making mistakes and they're delivering on their word, as we are."
GPFans is a multi-platform, multi-language brand dedicated to Formula One coverage. We bring you all the ins and outs of the sport, 24/7, everything from up-to-the-minute news and features to the latest viral stories and clips.
We believe that a new generation of exciting, outspoken drivers will make F1 more popular than ever before, and we want to give our users access to as much of their heroes as possible, on and off the track. From Lewis Hamilton to Max Verstappen, Daniel Ricciardo to Sebastian Vettel, we provide in-depth analysis of every every Grand Prix in the season, from Australia to Abu Dhabi.
With Formula One under the new ownership of Liberty Media, how the sport is being covered is evolving, and GPFans will look to be at the heart of this progression into new media, as one of the fastest-growing sites covering the king of motorsports.