LAS VEGAS — Though the NBA marketplace has overflowed with activity since the opening of free agency on July 1, Marcus Smart and his negotiating team are still waiting for their first call from the Celtics.

And according to someone close to the Smart camp, who requested anonymity to comment on the situation, the Celts guard is frustrated with the lack of outreach from his team.

“He loves the Celtics, but with these crickets he’s hearing, he’s hurt and disgusted by it,” said the source.

Though fellow 2014 lottery alumnus Dante Exum signed an eye-opening three-year, $33 million contract with Utah, for the most part the market has been bearish for restricted free agents.

However, limited prospects aren’t the main issue behind Smart’s disillusionment.

“I don’t think that bothers Marcus as much as no communication from Danny (Ainge),” said the source.

Reached Thursday, Ainge, the Celts president of basketball operations, declined comment.

For now, the only tangible bid from the team remains the $6.05 million qualifying offer tendered on June 29 to retain matching rights. For a player who projects his value in the vicinity of $14 million to $15 million, the lack of anything beyond a qualifying offer is being taken as an insult.

“He would have thought there would have been some kind of three- to four-year deal from them to show they’re interested,” said the source. “But the qualifying offer is the only one he has received, and there’s been no talk since free agency opened. He’s most disappointed that there has been no reaching out from their end.

“He’s just hurt and frustrated that Danny hasn’t reached out. That’s the most discouraging part of this whole thing. The last contact was a few days before free agency started.”

Smart has been in Dallas with his mother, Camilla, helping her deal with the pain and debilitation from bone marrow cancer. He recently moved her into an apartment across the street from the Dallas area clinic where she is receiving chemotherapy treatment.

And Smart is still waiting for that call, now with a thought that he may indeed have to plan on unrestricted free agency next summer when NBA teams are expected to once again be flush with money.

“If that’s the indication the Celtics are giving him — a one-year deal –— then absolutely, yes, he’s prepared for it,” said the source. “And that doesn’t bode well for the Celtics if it comes down to that.”

Teammates reached out to Smart, showing support and expressing hope he gets the contract he deserves.

“It’s like Isaiah (Thomas) last year, Marcus has played through injury,” the source said. “He pushed himself to return early (from thumb surgery) in the playoffs, taking the gamble that he was healed enough to play. He pours his heart out every day for that team. He’s been hurt and quite frankly disgusted by how this has gone. But you know what else? He’s kind of over it. You have to move on.”

Much has been made of the deal signed by Exum, a lavish reward for a player who averaged only 40.5 games over his first four injury-marred seasons.

Exum’s money isn’t the problem.

“Marcus doesn’t look at it that way — Oh, look what Dante got — but he does look at what he brings to the table for (the Celtics),” the source said. “And anyone who knows Marcus knows that he brings it all the time. Everyone knows he loves Boston. It’s his kind of place — loyal fans, a hard-nosed group. But there has been no progress in negotiations, regardless of what you might have read. That’s very untrue.”