Originally from Puente San Miguel in Spain, Barquín was finishing her degree in civil engineering this semester, the university said.
During her time in the US, she rose to prominence as a young golfer, winning the 2018 Big 12 university championship, and was named Iowa State Female Athlete of the Year.
The head of Spain’s Olympic Committee, Alejandro Blanco, spoke of his deep shock at the tragedy and solidarity with Celia Barquín’s family.
The university said she “was one of the most accomplished players in Cyclone golf history”, referring to the university’s sporting nickname.
“We are all devastated,” said the head women’s golf coach, Christie Martens.
“Celia was a beautiful person who was loved by all her team-mates and friends. She loved Iowa State and was an outstanding representative for our school. We will never forget her competitive drive to be the best and her passion for life.”
The university’s athletics director, Jamie Pollard, said: “Celia had an infectious smile, a bubbly personality and anyone fortunate enough to know her was blessed.”
-14 A Olson (US); -12 S Kim (Kor); -10 M Martin (US); -9 I Park (Kor), A Stanford (US), G Hall (Eng)
Selected others: -4 C Hull (Eng); +1 A Jutanugarn (Tha), P Creamer (US); +6 B Law (Eng)
American Amy Olson carded a second successive six-under 65 to take a two-shot lead into the final round of the Evian Championship in France.
The 26-year-old world number 89 had four birdies and an eagle to reach 14 under in the year’s final major.
British Open champion Georgia Hall returned her third successive round of 68 this week and is five shots back.
Fellow Englishwoman Charley Hull is joint 21st at four under after mixing three birdies and two bogeys in a 70.
Hall dropped shots at the 12th and 14th in round three but the 22-year-old from Dorset remained optimistic of consecutive majors.
“I think I’ve had some putts every day that have just missed, like a lot of players, but I think I’m in with a good chance tomorrow and four, five shots isn’t that much around this golf course,” she said.
Olson, still awaiting her first title having turned professional in 2013, was one of four leaders going into round three.
Maria Torres, Puerto Rico’s first LPGA professional, double bogeyed the 12th and dropped shots at the final two holes to slip into a share of 11th, seven strokes adrift.
American Mo Martin posted a 69 and has sole possession of third, while Mi Hyang Lee is a shot further back after opening with a double bogey and racking up five further dropped shots in a mixed 73.
Korea’s world number 19 Sei Young Kim is on her own in second place at the Evian Resort Golf Club after seven birdies in a bogey-free 64.
-8 M Torres (PR), A Olson (US), M Martin (US), M Hyang Lee (Kor); -7 C Ciganda (Spa); -6 W Ling Hsu (Tpe), G Hall (Eng), S Yeon Ryu (Kor), A Ernst (US), B Henderson (Can), J Shin (Kor), A Stanford (US)
Selected others: -5 I Park (Kor); -3 C Hull (Eng); +1 B Law (Eng); A Jutanugarn (Tha)
Missed cut: +4 L Thompson (US), C Matthew (Sco); +6 J Shadoff (Eng); +8 M Maclaren (Eng) +12 L Davies (Eng)
British Open champion Georgia Hall carded a second successive three-under 68 to sit two shots off the lead at the halfway stage of the Evian Masters.
The 22-year-old world number eight has dropped only one shot over the first 36 holes of the year’s final major.
Maria Torres, who was in Puerto Rico when Hurricane Maria hit last year, is one of four leaders at eight under.
World number one Park Sung-hyun and USA’s Lexi Thompson were among those to miss the cut, which came at three over.
Hall, starting on the back nine, bogeyed the 12th hole but recovered with two birdies on each nine to earn a share of sixth place.
“My long game was really good today,” she said. “I just couldn’t really hole that many putts so that was a little bit frustrating. But I holed some good ones as well so I’m happy.”
Torres, who came through the qualifying school to become the first woman from Puerto Rico to hold an LPGA Tour card, recorded consecutive bogeys from the 10th but had four birdies to add to her six and an eagle on the opening day.
American Amy Olson, the world number 89, set the pace for the day with a round of 65, recording seven birdies and one bogey.
Compatriot Mo Martin and Korean Mi Hyang Lee returned rounds of 66 at the Evian Resort Golf Club and are the other players at eight under.
Golfers around the world are getting their first glimpse of the new rulebook which will govern the game from the start of next year.
A raft of changes aimed at making golf quicker and more enjoyable will be introduced from 1 January, 2019. The R&A and the United States Golf Association, the joint rules-making bodies, have also taken steps to make them easier to understand.
For the first time a ‘player’s edition’ of the Rules of Golf has been launched and it includes diagrams and illustrations as well as more direct language to explain the complexities of the game.
“This is a pretty exciting day for us, it has been six and-a-half years in the making,” David Rickman, the R&A’s director of governance told BBC Sport.
“We have millions of people around the world who love this sport and want to play by the rules. We needed to step up and give them the best opportunity to do that.”
Changes that come in next year were first launched for public consultation in March 2017. The authorities received more than 30,000 pieces of feedback before refining the proposals which were published on 12 March this year.
Among the alterations coming into force
Free and penalty drops being made from knee rather than shoulder height
The flag no longer needing to be removed from the hole for putts on the green
Caddies not allowed to line up players before they hit shots
No penalty for an accidental double hit
“The general tenor of these changes has been the removal of penalties, the removal of restrictions, creating a slightly more relaxed approach,” Rickman said.
“There are one or two areas, and caddie lining up is perhaps the primary example, where there is a new restriction coming in 2019.”
Players will also be able to access the new rulebook online and through a smartphone app. The R&A admit that previous rulebooks were difficult to understand.
“The rules were cleverly written but they were quite sophisticated and you had to know your way round them so we did spend a lot of time looking at layout and structure,” Rickman added.
“This is all now very real and now the new rules are out there. The new players’ edition, something we have not done before, concentrates on the most commonly occurring rules and allows us to focus on those.
“We can present them in different ways, more direct language, a lot of diagrams and illustrations which are particularly useful around relief options.
“It is also worth noting modified rules for players with disabilities. We’ve had these modifications in place for the best part of 20 years but we haven’t promoted them as much as we perhaps should.
“We’ve been delighted to work with individual players and group organisations to modernise these as well and launch them at the same time.”
The launch of the new rulebook comes on the same day as the R&A revealed what it calls a “playbook” outlining the governing body’s “vision, purpose and values”.
They aim to make golf more accessible, appealing and inclusive while upholding the sport’s traditions and breaking down barriers to progress.
Investment totalling £200m is being promised to develop golf over the next decade.
“Our new brand brings together everything we have done over the last three years on ways to modernise golf and take the sport forward,” said R&A chief executive Martin Slumbers.
“We have a global role to play in leading the sport, while working collaboratively with our partners and international affiliated organisations to grow and nurture golf to ensure that it continues to thrive in 50 years’ time.”