Boston did not have a first-round pick in the 2018 Draft, having sent it to the New York Rangers in the trade for forward Rick Nash.
The Bruins look to be subscribing to the philosophy that a team never can have enough defensemen, and captain Zdeno Chara, 41, won't play forever.
"Looks like a smart player," Bruins player development coordinator Jamie Langenbrunner said during Boston's development camp last month. "Give him the 'hockey player' designation. Finds ways to make plays in traffic. Skating looks definitely above average. He's got some strength to him."
The 6-foot, 179-pound right-handed shot has room to grow, and he'll try to continue to do that with Djurgarden of the Swedish Hockey League after thriving for their club in Sweden's junior league last season. He was third among defensemen in the league with 31 points (five goals, 25 assists) in 42 games.
"My past season was pretty good," he said. "There were some ups and downs but it turned out in a very good way in Sweden and so on."
Defenseman Victor Berglund, a seventh-round pick (No. 195) by the Bruins in 2017, got to see Anderssonl up close when Modo and Djurgarden played last season.