"We have had discussions, and while it is a challenging situation, Jess is an incredibly resilient individual," Wiegman informed reporters in Geneva prior to Tuesday's semi-final clash.
"She felt, as did we, that we needed to address this; we couldn't simply ignore it.
"So we did, and we recognize there is a match ahead, and we want to perform - we are ready to compete, she is ready to compete, and that speaks volumes about her and the team."
Carter, 27, has participated in all matches of the reigning European champions so far in the tournament held in Switzerland, including the thrilling penalty shootout victory over Sweden in the quarter-finals.
On Sunday, the English Football Association disclosed that it had notified UK police as soon as it became aware of the harassment.
Carter, who plays club football in the United States, mentioned that she would take a break from social media to keep her focus on the tournament.
"It is truly unfortunate that we have to deal with this," Wiegman added.
"It is absurd and vile that this is occurring, and it transcends football, so we had to acknowledge it and support Jess."
Midfielder Georgia Stanway, on the other hand, emphasized that the events had united the team as they aim for a third consecutive major tournament final.
"If anything, it has likely strengthened our bond as a team," remarked the Bayern Munich player.
"There are aspects we will never fully comprehend. We need to eradicate it from society and from football," she continued, noting that the squad had decided to stop taking a knee to emphasize racism because it had become "somewhat repetitive."
"We felt it had reached a point where it was no longer serving its intended purpose. Hopefully, that will lead to more change and prompt discussions."
No complacency
Despite the high stakes, Italy defender Cecilia Salvai set aside rivalry before the semi-final encounter as she expressed support for Carter.
"As a player, I can assure you we will not be adversaries tomorrow," Salvai stated.
"I truly hope she can participate because it is a semi-final, so I wish for her to distance herself somewhat from what has transpired. We stand in complete solidarity with her."
England came back from the edge against Sweden in Zurich, scoring twice late to force extra time before winning in a remarkable penalty shootout.
If they win against the 13th-ranked Italy, they will progress to Sunday's final against either Germany - the team they defeated in the 2022 final at Wembley - or Spain, who overcame them in the 2023 World Cup final in Sydney.
"It would be extremely disrespectful to Italy to assume we are the favorites. They reached the semi-finals just as we did, which is quite impressive for any team, so complacency would be the greatest error you could make," Wiegman remarked as she dismissed that label.
"We have observed their style of play, so I don’t believe there is anything that could lead you to think we might be the favorites. We must be at our absolute best to secure a victory."
Wiegman also hinted that all her players were fit and available for the match, suggesting that captain Leah Williamson should play despite being forced off with an ankle injury against Sweden.
Italy is in the semi-finals of a major tournament for the first time since the 1997 Euros after defeating Norway in the previous round, when veteran Cristiana Girelli scored a last-minute winner.
"We are aware of England's strengths," acknowledged Italy's coach Andrea Soncin.
"They are the champions; they possess experience in matches like these, but we are firmly convinced that we can compete against them. We have a great aspiration and we want to reach the final."