Is deleting a verified mobile phone number increase the chance of suspension of my new Facebook account?

I have 1 new Facebook account with 1 verified e-mail address and 1 verified mobile phone number.

Is deleting a verified mobile phone number increase the chance of suspension of my new Facebook account?

Yes, I actually had my personal Instagram account banned this way. It was painful to get it back.

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It can bite you later when they ask you to re-verify an account using an old number.

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Definitely yes! Increases the probability of blocking your account. Since Instagram and FB are the same organization, they have a lot of generally related algorithms.
For both Instagram and FB, deleting a phone number is risky.