A seemingly accidental posting on Samsung's UAE website (which you can still read in its cached form) was spotted by Samsung Community and Gadgets & Wearables and has revealed pretty much everything about the wearable, which is shaping up to be a big upgrade on its aging predecessor.
The Galaxy Fit 3 will seemingly sit somewhere between a smartwatch and a fitness tracker. One of the biggest upgrades is a larger 1.6-inch AMOLED display (up from 1.1-inch on the Fit 2), measuring 40mm diagonally rather than 27.8mm.
According to the leaked specs, the Fit 3 will also get a more premium aluminum build (rather than polycarbonate), plus other new features including fall detection and a light sensor, which will help adjust the screen according to ambient light. The Fit 3 also promises to have the same IP68 and 5ATM water resistance as before (up to 50m for ten minutes).
The listing also suggests that the Galaxy Fit 3 will inherit a few other features from Samsung's Galaxy Watch series, including its Sleep Coach and Snore Detection. What you won't get, compared to the Galaxy Watch 6, is built-in GPS, NFC, a microphone, third-party apps, blood pressure monitoring, or ECG. Like before, it seems the Fit 3 offers exercise tracking from just an optical heart-rate sensor.
One other slight disadvantage of that much-improved screen appears to be a slight reduction in battery life. Samsung's leaked marketing claims a 13-day battery life for the Fit 3, compared to 15 days for the Fit 2. Still, that'd likely be more than enough for most people, particularly compared to the 40-hour stamina of the Galaxy Watch 6.
Halfway towards the Galaxy Watch 6?
The only things we don't really know about the Galaxy Fit 3 are its price and release date. Given the extent of these leaks, a February announcement looks likely –although there's no sign of an official launch yet.
The Galaxy Fit 2 cost only $59 / £39 / AUS$135 when it arrived four years ago, so a price increase is also probably on the cards given the much-improved screen shown in the leaked Samsung listing.
But if the Fit 3 can land somewhere close to the price of the Fitbit Luxe ($109.95 / £109.99 / AU$199.95), which currently sits top of our guide to the best fitness trackers, it could be a compelling new option for those who find the Samsung Galaxy Watch 6 to be overkill.
In fact, these leaks suggest the Samsung Galaxy Fit 3 could be more of a compact smartwatch than a traditional fitness tracker. The key difference is that you won't be able to install third-party apps on the Fit 3, but a lot of smartwatch-style features –from GPS to sending texts and playing music – can be overcome by pairing it with your Galaxy smartphone.
If the Fit 3 can overcome the "questionable heart-rate accuracy" we found in its predecessor, it could be a strong new Fitbit rival. Particularly as it's likely to benefit from the big incoming Samsung Health app update, which was revealed alongside the Samsung Galaxy Ring teaser last month.
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Mark is TechRadar's Senior news editor. Having worked in tech journalism for a ludicrous 17 years, Mark is now attempting to break the world record for the number of camera bags hoarded by one person. He was previously Cameras Editor at both TechRadar and Trusted Reviews, Acting editor on Stuff.tv, as well as Features editor and Reviews editor on Stuff magazine. As a freelancer, he's contributed to titles including The Sunday Times, FourFourTwo and Arena. And in a former life, he also won The Daily Telegraph's Young Sportswriter of the Year. But that was before he discovered the strange joys of getting up at 4am for a photo shoot in London's Square Mile.