Yes, Smaart technology is no longer included on the Series 3 platform. This would have increased the the cost of the Series 3 mixers (license to use Smaart), as well as additional development time.
The Series 3 mixer does have an RTA that can be enabled on any EQ. Tone Generator is planned to be included in a later firmware as well.
If you are interested in using Smaart, you can purchase a full license of their software from Rational Acoustics directly, or use an alternative software like REW (which is free).