In a large, heavy skillet or saucepan heat 1 tablespoon butter over medium heat. Add 1 clove of garlic, shallots, salt and rice and lightly sauté to toast the rice. Cook until rice becomes translucent and shallots soften, stirring continuously.
Begin adding broth, 1 ladle-full at a time, stirring constantly. As broth absorbs, add the next ladle-full and repeat until all broth is absorbed. Once broth is absorbed, add 1 cup wine and simmer, stirring occasionally until fully absorbed.
Meanwhile, in a large skillet over medium heat, melt the remaining 2 tablespoons of butter. Add remaining 3 cloves of garlic, lemon juice, and parsley, and stir until fragrant, about 1 minute, then add shrimp and season with salt. Cook shrimp until pink, 3 to 4 minutes, then add remaining 1/2 cup wine. Bring to a simmer, then add shrimp mixture and Parmesan to risotto and stir until combined and creamy.
Serve topped with additional parsley, if desired.