Donquixote Doflamingo [OP14-069]

If my Leader does not have the {Donquixote Pirates} type and I returned 3 of my DON!! cards from my field to my DON!! deck using this card's [On Play] effect, can I still activate the "Up to 3 of your opponent's Characters with a cost of 7 or less cannot be rested until the end of your opponent's next End Phase." effect?

Yes, you can.