Whisk flour, salt, and pepper in a shallow bowl. Dredge shrimp in the mixture, shaking off excess.
Heat olive oil and 1 tablespoon of butter in a large skillet over medium-high heat.
Sear shrimp for 2 minutes per side until opaque. Remove shrimp from skillet and set aside.
Add garlic to the skillet and sauté for 30 seconds until fragrant.
Deglaze the pan with white wine, simmering for 2 minutes until reduced by half.
Stir in lemon juice, chicken stock, and capers. Simmer for 3 minutes.
Whisk in remaining 2 tablespoons of butter until sauce is emulsified.
Return shrimp to the pan, tossing to coat thoroughly.
Garnish with parsley and serve immediately.