Spell disruption and actions

[Raisse]

If you begin casting a spell that requires 3 actions (Material, Somatic and Verbal), and you begin by using the Material Casting action only to be interrupted by an Attack of Opportunity that deals more damage than your level your spell is disrupted.

Do you have 2 or 0 actions remaining that turn?

[Fuzzy-Wuzzy]

You have 2 actions left. You're also free to just stop the activity partway through the required actions if you have a sudden urge to do something else. In other words, there is no commitment to finishing the string of actions you originally intended to carry out.

Or so I think....

Nevermind!

[Xenocrat]

0 actions remaining.

Activities, pg 296 wrote:

You have to do an activity all at once. In an encounter, this means you must complete it during your turn, but outside of encounters, activities can take minutes, hours, or days. If an activity gets interrupted in an encounter, you lose all the actions you committed to it.