diff --git a/tools/lambda-promtail/main.tf b/tools/lambda-promtail/main.tf
index 7d7054b223525..5e9b5224b67fb 100644
--- a/tools/lambda-promtail/main.tf
+++ b/tools/lambda-promtail/main.tf
@@ -189,6 +189,8 @@ resource "aws_lambda_function" "this" {
   memory_size  = 128
   package_type = var.lambda_promtail_image == "" ? "Zip" : "Image"
 
+  reserved_concurrent_executions = var.lambda_reserved_concurrent_executions
+
   # From the Terraform AWS Lambda docs: If both subnet_ids and security_group_ids are empty then vpc_config is considered to be empty or unset.
   vpc_config {
     # Every subnet should be able to reach an EFS mount target in the same Availability Zone. Cross-AZ mounts are not permitted.
diff --git a/tools/lambda-promtail/variables.tf b/tools/lambda-promtail/variables.tf
index 4639ca9229546..e5b22ffebbb45 100644
--- a/tools/lambda-promtail/variables.tf
+++ b/tools/lambda-promtail/variables.tf
@@ -102,6 +102,12 @@ variable "batch_size" {
   default     = ""
 }
 
+variable "lambda_reserved_concurrent_executions" {
+  type        = number
+  description = "Amount of reserved concurrent executions for the Lambda function. A value of -1 removes any concurrency limitations. A value of 0 prevents the Lambda function from being triggered at all."
+  default     = -1
+}
+
 variable "lambda_vpc_subnets" {
   type        = list(string)
   description = "List of subnet IDs associated with the Lambda function."