The Former Yugoslav Republic of Macedonia, Luxembourg and Hungary will visit the Copper Box in September, and GB stalwart Clark is keen to put on a show for the home fans.
But the forward is well aware those games will be all about results.
"It's a very, very important summer," said Clark, who played 33 games in the Spanish top-flight with MoraBanc Andorra last season.
"If we mess up this year, it's not going to make things easy off the court.
"It's a very big summer on the court and I think people have to realise that and make sure everything is in place so we can be as successful as possible."
One part of the puzzle that Clark feels is already in place is the head coach, Prunty.
The Milwaukee Bucks assistant boasts a wealth of top-level experience and expertise, but it is his ability to connect with people, which stands out to those in the GB camp.
Clark added: "Joe has been a great addition to GB. For the future coaches that will come in, I think Joe is a great example to follow.
"He's a really good people person and a great people manager within the team and that is very important in a national team environment because people aren't there for the money or the contract, they are there because they want to play for their country.
"I think Joe realises that, respects that and he wants us to win more than anything even though he is not 100 per cent British - although little by little I consider him more British than he thinks he is."
That sense of pride and patriotism clearly resonates with Clark, and representing his country is a responsibility he takes seriously.
"As the GB men's team we have to set the example for the under-18s and the under-20s that the national team is probably the most important team you are going to play basketball for.
"You can play for a great club or a great team and win this championship or that championship, but there are not many chances to represent this many people at one time because, at the end of the day, we represent the whole of Great Britain when we put that shirt on."
Clark also takes a keen interest in the next generation of players that could potentially pull on a GB jersey.
As well as hosting his own camp in Essex earlier this month, the 27-year-old put some of the Deng Academy youngsters through their paces during a mini-clinic at Brixton Recreation Centre ahead of the third annual Hoopsfix All-Star Classic.
Clark took part in the inaugural HASC event, as part of an under-26 roster, but he is excited to see younger players now be given the platform to show what they can do in the under-17 and under-19 contests.
"It's definitely an event on the basketball calendar in England that everyone looks forward to," he said.
"It's one of the most respected events at the moment. Everyone is looking forward to see who is on the rosters, who's in the game and who is coaching and I think Sam Neter and Hoopsfix do a really good job of presenting it and getting all the best talent in the country together in once place, which is not an easy thing to do.
"It's important at that age that they get a chance to shine and to show what they can do."
You can watch GB's senior men show what they can do at the Copper Box in September as tickets for the three home qualifiers are now on sale HERE.