巴塞尔协议III（英语：Basel III）是由国际清算银行制定，同时得到世界各主要经济体的中央银行（即巴塞尔银行监理委员会）参与制定并同意实施的全球金融监管标准。作为巴塞尔协议的第三版，协议着眼于通过设定关于资本充足率、压力测试、市场流动性风险考量等方面的标准，从而应对在2008年前后的次贷危机中显现出来的金融体系的监管不足。协议强化了资本充足率要求，并添加了关于流动性与杠杆比率的要求。例如，在巴塞尔协议II中，对于信贷和其它信用资产的风险的衡量在很大程度上依赖于外部机构（特别是信用评级机构）的评定，而这个些机构又是不在被监管的范围内的。这导致了一些事后得知并不安全的资产（如某些债权抵押证券）在当时被贴上了非常安全的AAA标签，而这些也对金融危机的产生起了推波助澜的作用。在巴塞尔协议III中，这此信贷产品的风险的衡量则被要求进行更为严谨的情景分析。

Basel III (or the Third Basel Accord) is a global, voluntary regulatory framework on bank capital adequacy, stress testing, and market liquidity risk. It was agreed upon by the members of the Basel Committee on Banking Supervision in 2010–11, and was scheduled to be introduced from 2013 until 2015; however, changes from 1 April 2013 extended implementation until 31 March 2018 and again extended to 31 March 2019. The third installment of the Basel Accords (see Basel I, Basel II) was developed in response to the deficiencies in financial regulation revealed by the financial crisis of 2007–08. Basel III is intended to strengthen bank capital requirements by increasing bank liquidity and decreasing bank leverage.