My memory has apparently completely failed me. Thanks, Cuno, for the information.

godefroi:
F3 is pretty much an F4 without the FPU and DSP, right?
They have FPU and DSP but too small memories for NETMF. Up to 48 KB RAM; up to 80 KB RAM seems to be planned for later (which would be ok for small applications).
STM32F3 Mixed-Signal Microcontrollers (MCU) - STMicroelectronics
Doesn’t the 302/302 have up to 512? Or is that for another purpose?
Edit - 512 is flash