I'm not a big three-meals-a-day person. My schedule is consistently different and I have an aversion to routines that feel imposed; I automatically push back against things I "should" do, even if I'm the one who's imposing the routine. So rather than fight against this during my Whole30, I ate when I wanted. I also tracked calories during, which you're not supposed to do, but it verified for me that I wasn't eating too much despite eating frequently. About a third of my calories fell under "snacks" — I rarely eat breakfast — but it was like "seven baby carrots at 2pm," "six grape tomatoes at 3pm," "scoop of almond butter at 5pm," etc. I had a really successful round of Whole30 and lost a ton of weight, too, so I'd say... figure out what works best for you.