Explanation
ISO/IEC 27017:2015 is a standard that provides guidelines for information security controls applicable to the provision and use of cloud services by providing additional implementation guidance for relevant controls specified in ISO/IEC 27002, as well as additional controls with implementation guidance that specifically relate to cloud services1. ISO/IEC 27017:2015 is designed to be used by organizations for cloud services that intend to select controls within the process of implementing an information security management system based on ISO/IEC 27001, which is the international standard for information security management systems1. ISO/IEC 27017:2015 can help organizations to establish, implement, maintain and continually improve their information security in the cloud environment, as well as to demonstrate compliance with contractual and legal obligations1.
ISO/IEC 27002 is a code of practice for information security controls that provides best practice recommendations on information security management for use by those who are responsible for initiating, implementing or maintaining information security management systems2. However, ISO/IEC 27002 does not provide specific guidance for cloud services, which is why ISO/IEC 27017:2015 was developed as an extension to ISO/IEC 27002 for cloud services1.
Cloud Security Alliance (CSA) Cloud Controls Matrix (CCM) is a set of security controls that provides organizations with a detailed understanding of security concepts and principles that are aligned to the cloud model. The CCM is not a standard, but rather a framework that can be used to assess the overall security risk of a cloud provider. The CCM can also be mapped to other standards, such as ISO/IEC 27001 and ISO/IEC
27017:2015, to facilitate compliance and assurance activities.
NIST SP 800-146 is a publication from the National Institute of Standards and Technology (NIST) that provides an overview of cloud computing, its characteristics, service models, deployment models, benefits, challenges and considerations. NIST SP 800-146 is not a standard, but rather a reference document that can help organizations to understand the basics of cloud computing and its implications for information security.
NIST SP 800-146 does not provide specific guidance or controls for cloud services, but rather refers to other standards and frameworks, such as ISO/IEC 27001 and CSA CCM, for more detailed information on cloud security. References := ISO/IEC 27017:2015 - Information technology - Security techniques ...
ISO/IEC 27017:2015(en), Information technology ? Security techniques ...
ISO 27017 Certification - Cloud Security Services | NQA
An introduction to ISO/IEC 27017:2015 - 6clicks
ISO/IEC 27017:2015 - Information technology - Security techniques ...
[Cloud Controls Matrix | Cloud Security Alliance]
[NIST Cloud Computing Synopsis and Recommendations]

Explanation
When reviewing a third-party agreement with a cloud service provider, the greatest concern regarding customer data privacy is the return or destruction of information. This is because customer data may contain sensitive or personal information that needs to be protected from unauthorized access, use, or disclosure. The cloud service provider should have clear and transparent policies and procedures for returning or destroying customer data upon termination of the agreement or upon customer request. The cloud service provider should also provide evidence of the return or destruction of customer data, such as certificates of destruction, audit logs, or reports. The return or destruction of information should comply with applicable laws and regulations, such as the General Data Protection Regulation (GDPR), the California Consumer Privacy Act (CCPA), or the Health Insurance Portability and Accountability Act (HIPAA). The cloud service provider should also ensure that any subcontractors or affiliates that have access to customer data follow the same policies and procedures12.
References:
Cloud Services Agreements - Protecting Your Hosted Environment
CSP agreements, price lists, and offers - Partner Center