I think that this amends, but doesn't change, Alex's answer.
You still can't break up the draw of 3 to discard - but you can break it up to play a card (but not one you've drawn.)
I have 4 cards. I can draw 3, hold 5.
Legal:
Discard 1
Draw 2
Play 1 (from the original 4)
Draw 1
This might seem kinda hokey, but in an endgame situation where you're trying to collect symbols, you may want to see what cards you draw before you decide which you want to play or discard.
You still can't break up the draw of 3 to discard - but you can break it up to play a card (but not one you've drawn.)
I have 4 cards. I can draw 3, hold 5.
Legal:
Discard 1
Draw 2
Play 1 (from the original 4)
Draw 1
This might seem kinda hokey, but in an endgame situation where you're trying to collect symbols, you may want to see what cards you draw before you decide which you want to play or discard.