That is a tricky question. How long in flower are you? Some ppl leave all leaves that aren’t blocking bud sites. And some do a major defol at 21 days and 42 days from flip. I’m doing both this grow 
@Dman1969 I haven’t been keeping track so im not sure exactly but I would say maybe week 2 of flower
There not small they look great! In my opinion if you don’t want to do the major defol then let those leaves stay. As long as they aren’t blocking bud sites!! If your plant needs something it will eat those leaves first. I’ve grown both ways and I’m doing an experiment on this grow. So don’t take my words to heart. Stay tuned to this channel for the results.
But your button buds look fantastic!! 
Sickkid does a heavy defol at day 21, if you wanted to try that technique…
Welcome I usually take a few leafs and Tuck a few for a couple reasons better light penetration and air flow. looking at the overall plant it should have great light penetration an air flow. Just my thoughts good luck.
That top pic appears to be a phosphorus def…
Feed with high P and K
I’ve been feeding twice the recommended dose @Enlightened420
With these @enlightened420
Thanks for the tag ! My first thoughts if not already I would introduce a little calmag into their diet on water day. I see some rusty spots. Also follow up check pH and PPM run off and make adjustments accordingly. Just my thoughts good luck
@kellydans I thought a 3 part nutrient series would be more than enough, but you think I need cal mag ?
If it was my plants I would use some cal-mag it has very little NPK value. Have you checked your pH runoff.
I have not I’ve been very lazy haha I need to check it