In a hypothetical battle between SSJ3 Goku from Dragon Ball Z and Naruto Uzumaki from Naruto Shippuden, it’s difficult to directly compare them, as they come from two different universes with distinct rules and powers.

• SSJ3 Goku: At his peak in Dragon Ball Z, Super Saiyan 3 (SSJ3) Goku possesses immense physical power, speed, and energy manipulation abilities. He can destroy planets, perform instantaneous teleportation (Instant Transmission), and unleash devastating energy blasts like the Kamehameha and Final Flash. His power level in SSJ3 far exceeds most other characters in the Dragon Ball Z universe​.
• Naruto Uzumaki: By the time Naruto becomes the protagonist of Naruto Shippuden and even more so in Boruto, his power includes access to the chakra of the Nine-Tails (Kurama), the Sage of Six Paths’ abilities, and mastery over techniques like Rasengan and Shadow Clones. With the help of the Tailed Beasts and his ability to heal himself through immense chakra reserves, Naruto has become an almost indestructible force in his universe​.

In a direct fight:

• SSJ3 Goku‘s sheer physical power and combat skill would likely give him an overwhelming advantage in raw strength and speed.
• Naruto has immense chakra, versatile jutsu, and strategic intelligence, which could potentially allow him to outlast or find a way to counter Goku’s brute force. However, Goku’s transformations and energy attacks might overwhelm Naruto’s defenses​.

Ultimately, SSJ3 Goku would probably win due to the enormous power gaps seen between Dragon Ball Z’s top characters and Naruto’s universe fighters, though Naruto’s tactics and endurance would make the fight interesting.