Buying a Rivian? Use code "JOSE1715716" and we both get rewarded or just click here - Rivian R1 Shop
Rivian CEO RJ Scaringe confirmed to Nilay Patel on the Decoder podcast that Rivian will be launching the Rivian R3X before the R3.
RJ stated that after the Rivian R2 is launched, they’ll be allowing some time to get that stable before launching R3. No date or timeframe was given for any R3/R3X launch.
Source: The Verge