This is my onpage.phtml page to get product id. I need to remove all other products in cart except the mention product id below if this product is on cart.

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$cart = $objectManager->get('\Magento\Checkout\Model\Cart'); 

// retrieve quote items collection
$itemsCollection = $cart->getQuote()->getItemsCollection();

// get array of all items what can be display directly
$itemsVisible = $cart->getQuote()->getAllVisibleItems();

// retrieve quote items array
$items = $cart->getQuote()->getAllItems();

foreach($items as $item) {// product id 
    $it[] = $item->getProductId();
if (in_array(483, $it)){
  //What logic to make here?

Change your foreach function to this:

$quoteId = $cart->getQuote()->getId();
$quoteModel = $objectManager->create('Magento\Quote\Model\Quote');

foreach($items as $item) {// product id 
    $itemId = $item->getItemId();
    if($itemId == "483") {
        $quoteItem = $quoteModel->load($quoteId);
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  • Thanks for your response. But it is not working. – Ramesh KR Jan 23 '18 at 12:19

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