Thomas Markle Calling 'Bulls***' on Claims He Hasn't Tried to Call Meghan

Meghan Markle's dad is forcefully pushing back against claims he's refusing to reach out to his daughter ... TMZ has learned.

A close friend of Thomas Markle tells TMZ ... all the claims made by Meghan's friends about his relationship with his daughter are "bulls***" ... and Thomas can prove it.

In a recent People story, Meghan's friends claimed Thomas refused to call or text his daughter since she entered the British Royal Family ... but we're told Thomas says that's complete "nonsense."

We're told Meghan's dad texted a loving message on her wedding day, and they spoke over the phone the day before the royal wedding -- with Meghan expressing worry for her dad's health issues, and Prince Harry wishing him well.

However, our sources say things drastically changed after Meghan and Harry tied the knot ... because we're told the Duke and Duchess of Sussex stopped communicating with Thomas and went radio silent.

We're told Thomas tried reaching Meghan multiple times by text ... to no avail.

Bottom line ... Thomas hasn't heard from Meghan for months.