Update the microservices in namespace

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Cluster information:

Kubernetes version:1.12.8
Cloud being used: (put bare-metal if not on a public cloud) AWS
Installation method: Terraform, helm charts
Host OS: Ubuntu 18

###CNI and version:
###CRI and version:

I am working in a Java Springboot micro service based complex application which comprises of 30 services. All are contanerized and from ECR , services are deployed inside kubernetes namespace in AWS. Everytime , namespace is purged and all services are deployed. How can I update only one service inside a namespace…is it possible to do that kind of deployment