Albert Barnes Commentary Matthew 15:3

"And he answered and said unto them, Why do ye also transgress the commandment of God because of your tradition?" — Matthew 15:3 (ASV)

But he answered. They accused him of violating their traditions, as though they were obligatory. In his answer, he implied that they were not bound to obey their traditions. They were invented by men.

He also said that those traditions could not be binding, as they violated the commandments of God. He proceeded to specify a case where their tradition made void one of the plain laws of God. And if that was their character, then they could not blame him for not regarding them.

See Barnes on Matthew 15:1.

Regarding your tradition?, see Colossians 2:8, 23 and Titus 1:14.