PartiQL DELETE statement using AWS SDK v3 not working

I have an AWS Lambda function behind API Gateway v2 that should delete an item from DynamoDB. When creating the endpoint, I based it off the AWS example code Delete an item from a table.

The parameter substitution works for other statements, such as SELECT and UPDATE, but the DELETE fails to execute due to the deserializer middleware failing to format the command.

Here's my PartiQL delete statement:

// Create PartiQL search query to delete item
const params = {
  Statement: `DELETE FROM "${tableName}" WHERE eventId=? AND siteId=?`,
  Parameters: [{S: eventId}, {S: siteId}],
};

// Delete item from database
await ddbDocClient.send(new ExecuteStatementCommand(params));

I receive the following error:

ERROR   SerializationException: Start of structure or map found where not expected
at throwDefaultError (/var/task/node_modules/@aws-sdk/smithy-client/dist-cjs/default-error-handler.js:8:22)
    at de_ExecuteStatementCommandError (/var/task/node_modules/@aws-sdk/client-dynamodb/dist-cjs/protocols/Aws_json1_0.js:1593:51)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async /var/task/node_modules/@aws-sdk/middleware-serde/dist-cjs/deserializerMiddleware.js:7:24
    at async /var/task/node_modules/@aws-sdk/lib-dynamodb/dist-cjs/baseCommand/DynamoDBDocumentClientCommand.js:26:34
    at async /var/task/node_modules/@aws-sdk/middleware-signing/dist-cjs/middleware.js:14:20
    at async /var/task/node_modules/@aws-sdk/middleware-retry/dist-cjs/retryMiddleware.js:27:46
    at async /var/task/node_modules/@aws-sdk/middleware-logger/dist-cjs/loggerMiddleware.js:7:26
    at async Runtime.handler (/var/task/src/events/endpoints/delete.js:24:9)

Here are the inputs I'm using:

{
    "Statement": "DELETE FROM \"myTable\" WHERE eventId=? AND siteId=?",
    "Parameters": [
        {
            "S": "d7b7f7fb-78c5-4d76-8b47-1316ae412de4"
        },
        {
            "S": "'test_site_1"
        }
    ]
}

However, if I provide only a statement with manual values fed in, it works:

DELETE FROM "myTable" WHERE eventId = '828474d8-982f-4955-8aed-bb8a8f373e4c' AND siteId = 'test_site_1'

I'm guessing that this may be an issue with the SDK's serialization middleware? Any ideas on how to resolve this?

I was using the wrong import

import {ExecuteStatementCommand} from '@aws-sdk/lib-dynamodb';

Instead of

import {ExecuteStatementCommand} from '@aws-sdk/client-dynamodb';