Canada is joining its closest intelligence allies in banning Huawei Technologies Co. and ZTE from fifth-generation wireless networks, Prime Minister Justin Trudeau’s government announced on Thursday. Ottawa had delayed the decision for more than three years, as relations between the two countries deteriorated, and a ban would almost certainly stoke tensions. But the long-awaited announcement will be welcomed by President Joe Biden’s administration, which has sought to steer countries away from Huawei. American officials allege its gear could allow the Chinese government to interfere with 5G networks. Since 2019, the US has imposed what may be the strongest sanctions it...