Given that the company announced the previous Gear smartwatch, the S2, at IFA 2015, it's pretty likely that the press invite above spotted by AndroidCentral refers to the next model. That and the rumors swirling around the new gadget the past few weeks. SamMobile was the first to release details about the awaited product, noting that it will likely have a circular face with a rotary bezel like the last one. Further reports from the site report that the upcoming S3 will come in standard and "Classic" variants along with a new "Explorer" model.
Note that Samsung hasn't directly confirmed any details nor have they released any images of the upcoming smartwatch. But if you're curious for any peek at possible designs, sketchy photos and renders have been online for a few months. For the rest of us, we'll have to wait til IFA begins on September 7th.