Chain 3 single crochet picot is a one of the basic crochet stitches.
At all crochet schemes chain 3 single crochet picot symbol would appear as:
At the scheme below you can see a stitches of chain 3 single crochet picot.
Chain 3 single crochet picot instructions
Create three chain stitches from the point in your row where you want to add the picot.
Insert your hook under the loops of the single crochet. Pull the yarn back.
Catch the yarn and draw it through two loops on the hook.
You should now see a picot on a single crochet.
Repeat the preceding steps.
Save this step by step tutorial as a reminder