Samsung Galaxy Tab 3 is rumored to be announced sometime in September, during IFA 2013 event.
New details showed up about the next generation Galaxy tablets by Samsung. The GT-P3200 Galaxy Tab 3 7/8” will run on Android 4.2.1 and uses a 7/8” display with resolution of 800 x 1280. The information came from GLBencmark. According to them the CPU will be between the 200~1500 Mhz and with a Mali-400MP GPU. There is still no confirmation about which screen size Samsung will use, earlier SamMobile reported about the Galaxy Tab 7.0” being dropped. Sadly, the Galaxy Note 8.0 uses the same resolution as the Galaxy Tab 3 and the Galaxy Note 8.0 uses a 8.0” screen.
Source: Sam Mobile