Pull signal to GND in 3.3V circuit, best way to do it?
If you've been told to pull a logic signal to ground you can expect the voltage to be 5V or less and the current to be less than 10mA
the BSS138 mosfet in  your schematic has no performance figures in the datasheet for less than 4.5V gate drive, so is not a good choice. RK7002BM might be a better choice.