Bardock's Super Saiyan 3 Form Is Even Stronger Than Dragon Ball's Gods

Bardock's power as a Super Saiyan 3 was enough to overcome Mechikabura's mind control and pose a threat to Dark King Vegeta, a rival to Beerus.

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Super Saiyan, Dragon Ball Wiki

Dragon Ball: 15 Things Fans Need To Know About Super Saiyan 3

Best enemies - Chapter 96, Page 2270 - DBMultiverse

Is Super Saiyan 3 Bardock More Powerful Than Beerus?!?!

8 Strongest Saiyans In Dragon Ball (& The 7 Weakest)

Why is Bardock from Dragon Ball Z so weak? - Quora

What's your opinion on ssj3 : r/Dragonballsuper

Not Vegeta, Another Dragon Ball Character's Super Saiyan Form Can Even Surpass Goku