Discount when purchasing multiple items

[spmd]

Hello, I am a massage therapist. I usally offer a discount during the holidays. The discount is given when someone purchases either 3 hour or 3 half hour massages. I can't see that there is a way to only apply a discount at checkout (online purchase either gift certificate I make or eGift card) with the stipulation that they buy 3 at a time. There is no if/then option? Discount if they reach a certain criteria - ie. purchase 3 massages? Am I missing this option or way to make it work? Any help appreciated. Thanks.

[VanKalkerFarms]

Currently, There is not a way to make that happen automatically.  You would have to apply the discount as the cashier.

[VBuena]

I am currently using another website platform, but would switch over for this one feature alone!  Please make available soon, especially for the online store where I can't have an easy discount button for a cashier to ring up.  I've loved everything about square so far, but this would transform my online sales.  PLEASE!