AWS Certificate Manager provides expanded usage of imported ECDSA and RSA Certificates

AWS Certificate Manager (ACM) now allows you to import Secure Sockets Layer/Transport Layer Security (SSL/TLS) X.509 certificates of additional key types and key sizes, including Elliptic Curve Digital Signature Algorithm (ECDSA) and RSA 3072 and 4096 keys and bind them with integrated services like Amazon CloudFront and Application Load Balancer. Previously, you could use AWS Identity and Access Management (IAM) to import and use these certificate types as ACM only supported usage of imported RSA 1024 or RSA 2048 key certificates.

Source:: Amazon AWS